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    Meet The New LT1 V8 For The C7



    William Maley

    Staff Writer - CheersandGears.com

    October 24, 2012

    Earlier this morning, General Motors debuted a brand new 6.2L LT1 V8 engine that will be in the seventh-generation Corvette.The new LT1 is full of new tech and comes with some impressive specs.

    The new 6.2L V8 will produce 450 HP and 450 pound-feet of torque. That can propel the C7 to 60 in under 4.0 seconds, which puts it within a hair of the 2012 Corvette Z06's 0-60 time of 3.7 seconds. Fuel economy is impressive, with GM claiming that the C7 will deliver up to 26 mpg highway.

    The new technology on the new LT1 V8 includes direct injection with “on demand” adjustable pressure, variable valve timing, a twisted-head design, and cylinder-deactivation. The new LT1 will also be claimed 40-pounds lighter and four inches shorter than BMW's 4.4L twin-turbo V8.

    The new LT1 V8 will be built at GM's Tonawanda plant, the same place where the first Chevy Small Block V8 was built in 1955.

    Press Release is on Page 2


    All-New 2014 Corvette LT1 V-8 a Technological Powerhouse

    • Advanced technologies including direct injection, active fuel management, continuously variable valve timing support advanced combustion system
    • Preliminary output of 450 horsepower (335 kW) and 450 lb.-ft. of torque (610 Nm)
    • Helps deliver estimated 0-60 performance in less than four seconds and best-ever fuel economy in the Corvette

    DETROIT – When the all-new 2014 Chevrolet Corvette arrives late next year, it will be powered by a technologically advanced, racing-proven 6.2L V-8 delivering an estimated 450 horsepower and helping produce 0-60 times in less than four seconds.

    The new Corvette LT1 engine, the first of the Gen 5 family of Small Block engines, combines several advanced technologies, including direct injection, Active Fuel Management and continuously variable valve timing to support an advanced combustion system.

    “Our objective for the development of the all-new LT1 was to raise the bar for performance car engines,” said Mary Barra, senior vice president, global product development. “We feel that we have achieved that by delivering a true technological masterpiece that seamlessly integrates a suite of advanced technologies that can only be found on a handful of engines in the world.

    “What makes this engine truly special is the advanced combustion system that extracts the full potential of these technologies. The art and science behind that combustion system make the Corvette LT1 one of the most advanced V-8 engines in the world,” said Barra.

    Output, performance, and fuel economy numbers will not be finalized until early next year, but the new LT1 engine is expected to deliver:

    • The most powerful standard Corvette ever, with preliminary output of 450 horsepower (335 kW) and 450 lb.-ft. of torque (610 Nm)
    • The quickest standard Corvette ever, with estimated 0-60 performance of less than four seconds
    • The most fuel-efficient Corvette ever, exceeding the 2013 EPA-estimated 26 miles per gallon on the highway.

    “The Holy Grail for developing a performance car is delivering greater performance and more power with greater fuel economy and that’s what we’ve achieved,” said Tadge Juechter, Corvette chief engineer. “By leveraging technology, we are able to get more out of every drop of gasoline and because of that we expect the new Corvette will be the most fuel-efficient 450 horsepower car on the market.”

    Advanced combustion system optimized with 6 million hours of analysis

    “The Corvette LT1 represents the most significant redesign in the Small Block’s nearly 60-year history – building on its legacy to make one of the world’s best engines even better,” said Sam Winegarden, vice president, Global Powertrain Engineering. “More than just great horsepower, the LT1 has been optimized to produce a broader power band. Below 4,000 rpm, the torque of the Corvette LT1 is comparable to that of the legendary, 7.0L LS7 out of the current Corvette Z06. The LT1 is a sweetheart of a power plant and drivers will feel its tremendous torque and power at every notch on the tachometer.”

    Increased power and efficiency were made possible by an unprecedented level of analysis, including computational fluid dynamics, to optimize the combustion system, the direct injection fuel system, active fuel management and variable valve timing systems that support it. More than 10 million hours of computational analysis were conducted on the engine program, including 6 million hours (CPU time) dedicated to the advanced combustion system.

    Direct injection is all-new to the engine architecture and is a primary contributor to its greater combustion efficiency by ensuring a more complete burn of the fuel in the air-fuel mixture. This is achieved by precisely controlling the mixture motion and fuel injection spray pattern. Direct injection also keeps the combustion chamber cooler, which allows for a higher compression ratio. Emissions are also reduced, particularly cold-start hydrocarbon emissions, which are cut by about 25 percent.

    Active Fuel Management (AFM) – a first-ever application on Corvette – helps save fuel by imperceptibly shutting down half of the engine’s cylinders in light-load driving.

    Continuously variable valve timing, which GM pioneered for overhead-valve engines, is refined to support the LT1 AFM and direct injection systems to further optimize performance, efficiency and emissions.

    These technologies support the all-new, advanced combustion system, which incorporates a new cylinder-head design and a new, sculpted piston design that is an integral contributor to the high-compression, mixture motion parameters enabled by direct injection.

    The LT1 head features smaller combustion chambers designed to complement the volume of the unique topography of the pistons’ heads. The smaller chamber size and sculpted pistons produce an 11.5:1 compression ratio, while the head features large, straight and rectangular intake ports with a slight twist to enhance mixture motion. This is complemented by a reversal of the intake and exhaust valve positions, as compared to the previous engine design. Also, the spark plug angle and depth have been revised to protrude farther into the chamber, placing the electrode closer to the center of the combustion to support optimal combustion.

    The pistons feature unique sculpted topography that was optimized via extensive analysis to precisely direct the fuel spray for a more complete combustion. The contours of the piston heads are machined to ensure dimensional accuracy – essential for precise control of mixture motion and the compression ratio.

    Race-proven legacy, state-of-the-art performance

    The first Small Block V-8 debuted in the Corvette in 1955. It displaced 4.3L (265 cubic inches) and was rated at 195 horsepower, drawing air and fuel through a four-barrel carburetor. Five years later, V-8 power helped Corvette secure its first victory at the 24 Hours of Le Mans.

    In 2012, the Small Block-powered Corvette Racing C6.R beat Ferrari, BMW and Porsche to sweep the drivers’, team, and manufacturer championships in production-based American Le Mans Series GT class. These championships make Corvette Racing the most successful team in ALMS history, with a total of 77 class wins, eight drivers’ championships, and nine manufacturer and team championships since 2001.

    “The engine requirements for a production car and a race car are remarkably similar,” said Jordan Lee, Small Block chief engineer and program manager. “In both cases, you want an engine that is powerful and efficient, compact and lightweight, and durable. That combination is what made the original Small Block so successful. Today, the introduction of state-of-the-art technologies and engineering makes one of the best performance car engines in the world even better.”

    As an example, the new LT1 engine is 40 pounds lighter than a competitor’s twin-turbo 4.4L, DOHC V-8 with similar output. That weight savings not only improves the Corvette’s power-to-weight ratio, but also contributes to a near-perfect 50/50 weight balance for enhanced steering response and handling.

    The new LT1 is also four inches shorter in overall height than the competitive DOHC V-8. That also improves handling by lowering the center of gravity while enabling a low hood line – contributing to the Corvette’s iconic profile, as well as ensuring exceptional driver visibility.

    The new LT1 is the third engine in the Corvette’s history to be so-named, with previous versions introduced in 1970 (Gen 1) and 1992 (Gen 2). All iterations of the LT1 – and all Small Block engines – have shared a compact design philosophy that fosters greater packaging flexibility in sleek vehicles such as the Corvette.

    “The power and efficiency of the Small Block V-8 are hallmarks of Corvette performance,” said Lee. “But, the compact size and great power-to-weight are just as important for the overall driving experience. The all-new LT1 will play a huge role in making the all-new Corvette a world-class sports car, in terms of technology, performance, and refinement.”

    Engine features and highlights

    All-aluminum block and oil pan: The Gen 5 block was developed with math-based tools and data acquired in GM’s racing programs, providing a light, rigid foundation for an impressively smooth engine. Its deep-skirt design helps maximize strength and minimize vibration. As with the Gen 3 and Gen 4 Small Blocks, the bulkheads accommodate six-bolt, cross-bolted main-bearing caps that limit crank flex and stiffen the engine’s structure. A structural aluminum oil pan further stiffens the powertrain.

    The block features nodular iron main bearing caps, which represent a significant upgrade over more conventional powdered metal bearing caps. They are stronger and can better absorb vibrations and other harmonics to help produce smoother, quieter performance.

    Compared to the Gen 4 engine, the Gen 5’s cylinder block casting is all-new, but based on the same basic architecture. It was refined and modified to accommodate the mounting of the engine-driven direct injection high-pressure fuel pump. It also incorporates new engine mount attachments, new knock sensor locations, improved sealing and oil-spray piston cooling.

    Advanced oiling system, with available dry-sump system: The LT1 oiling system – including oil-spray piston cooling – was also optimized for improved performance. It is driven by a new, variable-displacement oil pump that enables more efficient oil delivery, per the engine’s operating conditions. Its dual-pressure control enables operation at a very efficient oil pressure at lower rpm coordinated with AFM and delivers higher pressure at higher engine speeds to provide a more robust lube system for aggressive engine operation.

    Standard oil-spray piston cooling sprays the underside of each piston and the surrounding cylinder wall with an extra layer of cooling oil, via small jets located at the bottom of the cylinders. For optimal efficiency, the oil jets are used only when they are needed the most: at start-up, giving the cylinders extra lubrication that reduces noise, and at higher engine speeds, when the engine load demands, for extra cooling and greater durability.

    An available dry-sump oiling system promotes exceptional lubrication system performance during aggressive driving maneuvers and high cornering loads. It includes two stages: a pressure stage and a scavenge stage. The pressure stage includes the new, dual-pressure-control and variable-displacement vane pump.

    Dexos semi-synthetic motor oil, with a 5W30 specification, helps reduce friction to further enhance the LT1’s efficiency.

    New, tri-lobe camshaft: Compared to the Gen 4 Small Block, the camshaft remains in the same position relative to the crankshaft and is used with a new rear cam bearing, but it features an all-new “tri-lobe” designed lobe which exclusively drives the engine-mounted direct injection high-pressure fuel pump, which powers the direct-injection combustion system. The cam’s specifications include 14mm/13.3mm (0.551/0.524-inch) intake/exhaust lift, 200/207-crank angle degrees intake/exhaust duration at 0.050-inch tappet lift and a 116.5-degree cam angle lobe separation.

    New, cam-driven fuel pump: The direct injection system features a very-high-pressure fuel pump, which delivers up to 15Mpa (150 bar). The high-pressure, engine-driven fuel pump is fed by a conventional fuel-tank-mounted pump. The direct injection pump is mounted in the “valley” between cylinder heads – beneath the intake manifold – and is driven by the camshaft at the rear of the engine. This location ensures any noise generated by the pump is muffled by the intake manifold and other insulation in the valley.

    PCV-integrated rocker covers: One of the most distinctive features of the new engine is its domed rocker covers, which house the, patent-pending, integrated positive crankcase ventilation (PCV) system that enhances oil economy and oil life, while reducing oil consumption and contributing to low emissions. The rocker covers also hold the direct-mount ignition coils for the coil-near-plug ignition system. Between the individual coil packs, the domed sections of the covers contain baffles that separate oil and air from the crankcase gases – about three times the oil/air separation capability of previous engines.

    Intake manifold and throttle body assembly: The LT1’s intake manifold features a “runners in a box” design, wherein individual runners inside the manifold feed a plenum box that allows for excellent, high-efficiency airflow packaged beneath the car’s low hood line.

    Acoustic foam is sandwiched between the outside top of the intake manifold and an additional acoustic shell to reduce radiated engine noise, as well as fuel pump noise.

    The manifold is paired with an electronically controlled throttle, featuring an 87mm bore diameter and a “contactless” throttle position sensor design that is more durable and enables greater control.

    Four-into-one exhaust manifolds: The LT-1 uses a cast version of the “four-into-one” short-header exhaust manifold design used on the Gen 4 LS7 engine. The cast header passages enable consistent exhaust flow into the “wide mouth” collector at the converter.

    Cooling system, humidity sensor and more: Additional features and technologies of the Gen 5 Small Block include:

    • A revised cooling system with an offset water pump and thermostat for more efficient performance
    • Air induction humidity sensor ensures optimal combustion efficiency, regardless of the surrounding air’s humidity
    • 58X ignition system with individual ignition coil modules and iridium-tip spark plugs
    • All-new “E92” engine controller.

    General Motors’ investment in the Gen 5 Small Block will create or retain more than 1,600 jobs in five North American plants, including Tonawanda, New York, which recently received upgrades to support its production.

    William Maley is a staff writer for Cheers & Gears. He can be reached at william.maley@cheersandgears.com or you can follow him on twitter at @realmudmonster.

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    :metal: Rock On GM! :metal:

    I am excited by this engine and will be waiting to see what the Performance division does to take it to the next level. I suspect this engine has a ton more potential than they are initially giving in the base corvette.

    So BMW does 400HP/450ft lbs in a twin turbo V8 that is only 4.4L and this 6.2L is smaller and yet more powerful.

    Seems this engine will have a great range of power capabilities. :D

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    Now that it's out in the sun, here's summary of what made it and what didn't...

    What Made it

    • Direct Injection
    • Synchronous Variable Valve Timing
    • Cylinder Deactivation

    What didn't make it

    • Cam-in-cam independent Variable Valve Timing
    • Dual In-bloc Cam
    • Hemispherical Combustion Chamber w/ 3-valves
    • Raised Camshaft location (lighter valvetrain mass / higher rpm capability) -- AFM lifters can't cope anyway so it's moot
    • Variable Ratio Rocker assembly
    • Variable Volume Intake manifold
    • Variable Length Intake Runner Assembly
    • Non-Acoustic Knock Sensing (Ionic Knock detection via sparking plugs)

    In retrospect I can say the following:-

    • Power came in 20 hp less than my previous expectations (450 vs 470)*
    • Torque cam in 12 lb-ft higher than my previous expectations (450 vs 438**)
    • Compression came in 0.7 points lower than my expectations (11.5 vs 12.2)
    • Cam-in-Cam didn't make it (I expected it to)
    • We can finally put the 5.5 liter mythology to bed I guess.

    * This may indicate a relatively low red line (perhaps 6000~6100 rpm) perhaps imposed by the the cylinder deactivation system.

    ** 438 lb-ft was based on the limit of the 6L80 transmission.

    Regardless, this engine is in the ballpark of expectations and will serve the C7 very well. It will also serve Cadillac very well should they elect to adopt it for the ATS-V. It is, afterall, a lighter, smaller, more powerful and more torque engine than the Ford DOHC 5.0. It is also lighter, simpler and less expensive than Bi-turbo V6es of a similar output.

    Edited by dwightlooi
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    Nice engine and I wish they would put the Small Block name to rest as it deserves it's own heritage. The number of parts that carry over from the LS engine can fit in a small Zip Loc bag.

    Well the injectors will be buried for those who don't like the noise. I just hope they are easy to get to to replace them or that they are at the least durable.

    Too many idiots on Autoblog are complaining only 450 HP from 6.2? They seem to not read all the words that it will be no less than 450 HP. I still expect 460-470 HP by the release time. They said the base Vette would run with the present Grandsport.

    I still do not expect this in the ATS V but it will be in the new CTSV.

    The Z06 and ZR1 replacments should be interesting.

    I note they played with the valves like many of the aftermarket head companys have to get better flow. Trick Flow started it and many others hav followed with canting the valves. We found them to work years ago and GM has their own version now.

    Owners who add fuel pressure monitors will be shocked when they see over 2000 PSI on the High pressure pump side.

    What I found interesting was the choice of 6.2. They said it was because when the engine would go into V4 mode that there was too little power in the smaller engine. They said by increasing the size it gave the V4 mode enough power to remain in V4 mode for more MPG. The smaller engine would have been in V8 mode more and payed the MPG penalty. It had noting to do with efficency but with available power with 4 cylinders cut out.

    Edited by hyperv6
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    I still do not expect this in the ATS V but it will be in the new CTSV.

    The Z06 and ZR1 replacments should be interesting.

    Regardless of whether the ATS-V gets this engine, the CTS-V won't. The CTS-V is already at 556hp with the current LSA engine. It's replacement will need to be either a turbocharged or supercharged version of the LT1 to be at or above the current performance level.

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    BTW, just reading off GM's Powerpoint Slide, the output rpms appear to be

    598769_10151190678158930_992402708_n.jpg

    450 bhp @ 6000 rpm

    450 lb-ft @ 4200 rpm -- with at least 400 lb-ft (88.9%) available from 2000 to 6200 rpm

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    Nice numbers. Though ultimately I think I'm more of a smaller displacement, higher rev V8 sort of guy. I hope they also offer a 5.3L version with the same power, less torque, and a redline that exceeds 7,000 RPM.

    I had a Mustang GT 5.0 loaner two weeks ago, and man was that motor addictive. Had the grumble of an American V8 at low revs and the zing of an M3 or RS4 near redline.

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    Nice numbers. Though ultimately I think I'm more of a smaller displacement, higher rev V8 sort of guy. I hope they also offer a 5.3L version with the same power, less torque, and a redline that exceeds 7,000 RPM.

    I had a Mustang GT 5.0 loaner two weeks ago, and man was that motor addictive. Had the grumble of an American V8 at low revs and the zing of an M3 or RS4 near redline.

    Not sure if we will see a smaller V8 based on the Cylinder delete option. This is where GM claims a lot of MPG is gained and the smaller displacment just does not handle the power well with 4 cylinders.. They claim it would remain in V8 mode too much. Now if there were not a cylinder delet option being used we would have seen the smaller engine.

    The think with this engine is it will have torque from down low and hold it most of the way up like my Turbo Eco does. This will give this engine a feel unlike the LS3.

    The coming Turbo V6 will be the engine with more and faster revs but it too will also have low end torque that will remain all the way up. It will also have a noticable lack lag too.

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    I still do not expect this in the ATS V but it will be in the new CTSV.

    The Z06 and ZR1 replacments should be interesting.

    Regardless of whether the ATS-V gets this engine, the CTS-V won't. The CTS-V is already at 556hp with the current LSA engine. It's replacement will need to be either a turbocharged or supercharged version of the LT1 to be at or above the current performance level.

    The CTSV will get an engine based on this and we all know it will have a turbo or more than likely a supercharger. MY statment is that this engine is the base for all variation coming at GM. They may slap a supercharger on it and a LT5 name but it will be based on this engine with some changes just as the LS engines were. There will be a family of LT engines just as the LS engines.

    If anything I have heard numbers in the 600+ range may be in the offing for the CTS and the number 750 HP ZRI have been rumored. Just have to wait and see, but both are very easily done.

    Anyone else have the feeling that a 5.5L LTx engine is still in the cards?

    There was talk of a V6 version of this engine but nothing to prove that yet.

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    BTW, just reading off GM's Powerpoint Slide, the output rpms appear to be

    598769_10151190678158930_992402708_n.jpg

    450 bhp @ 6000 rpm

    450 lb-ft @ 4200 rpm -- with at least 400 lb-ft (88.9%) available from 2000 to 6200 rpm

    Good thing is that even after 5252 rpm, the power does not drop more than 5 hp to the redline. The torque curve is flatter than LS3.

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    What is it with GM and these "required" fluids? First it was Dexcool antifreeze, and that was somewhat of a disaster with all the clogged-up radiators and engine cooling passages. Now they're requiring the use of this Dexos semi-synthetic motor oil. I hope this doesn't turn into another bad idea. I think I read where they'll void your warranty unless Dexos is used and documented, if someone can confirm or deny for me.

    It's one thing, for example, to "recommend" Mobil 1 in the Corvette, but this Dexos situation, requiring its use on everything from Spark to XTS, seems like extortion to me. Besides... SO many things happen when cars are in the hands of customers. Jiffy Lube... Wal-Mart service centers... any number of mom-and-pop garages will be changing the oil on these cars in years hence. I predict another debacle and future ill will toward GM on behalf of customers over this.

    Seems like any 5W-30 should suffice. GM is citing fuel economy concerns as a reason for instituting this policy, but it sounds to me like they want everyone to go to the dealership for maintenance... or else.

    Edited by ocnblu
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    Dexos is just an oil rating. There are many many different Dexos rated oils. They are all basically the 5w-30 version of a brand's full synthetic product. It's actually better than recommending Mobile 1 because it is now not brand specific. Ask yourself this, why would GM want to be stamping Mobile1's brand on the engine cover of all of their products?

    But there is very little debate over whether synthetic oil is more healthy for an engine or not. It is... and it is within GM's rights to require its use for the car to be under warranty.

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    See how that works? Thanks for posting that link. So, a whole host of brands are approved for the Dexos1 rating, both full synthetic and synthetic blends. That will make a lot of GM buyers feel a bit better about this new requirement, even though it does require customers to spend more money on oil... and they'll just go back every 3,000 miles like the sticker on the windshield says, they won't pay attention to the DIC or the owner's manual.

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    Now that it's out in the sun, here's summary of what made it and what didn't...

    What Made it

    • Direct Injection
    • Synchronous Variable Valve Timing
    • Cylinder Deactivation

    What didn't make it

    • Cam-in-cam independent Variable Valve Timing
    • Dual In-bloc Cam
    • Hemispherical Combustion Chamber w/ 3-valves
    • Raised Camshaft location (lighter valvetrain mass / higher rpm capability) -- AFM lifters can't cope anyway so it's moot
    • Variable Ratio Rocker assembly
    • Variable Volume Intake manifold
    • Variable Length Intake Runner Assembly
    • Non-Acoustic Knock Sensing (Ionic Knock detection via sparking plugs)

    In retrospect I can say the following:-

    • Power came in 20 hp less than my previous expectations (450 vs 470)*
    • Torque cam in 12 lb-ft higher than my previous expectations (450 vs 438**)
    • Compression came in 0.7 points lower than my expectations (11.5 vs 12.2)
    • Cam-in-Cam didn't make it (I expected it to)
    • We can finally put the 5.5 liter mythology to bed I guess.

    * This may indicate a relatively low red line (perhaps 6000~6100 rpm) perhaps imposed by the the cylinder deactivation system.

    ** 438 lb-ft was based on the limit of the 6L80 transmission.

    Regardless, this engine is in the ballpark of expectations and will serve the C7 very well. It will also serve Cadillac very well should they elect to adopt it for the ATS-V. It is, afterall, a lighter, smaller, more powerful and more torque engine than the Ford DOHC 5.0. It is also lighter, simpler and less expensive than Bi-turbo V6es of a similar output.

    This LT1 engine weights 465 lbs. Coyote v8 weights 430 lbs. it is also heavier than M156 or M159 engine from Mercedes.

    Edited by dado
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    See how that works? Thanks for posting that link. So, a whole host of brands are approved for the Dexos1 rating, both full synthetic and synthetic blends. That will make a lot of GM buyers feel a bit better about this new requirement, even though it does require customers to spend more money on oil... and they'll just go back every 3,000 miles like the sticker on the windshield says, they won't pay attention to the DIC or the owner's manual.

    Unless they are really stupid customers to ignore their engine info center, most people should come to realize that we are at the end of days with the BS 3000 miles you change the oil. That was true of older cars of the 90's and older than that, but not with todays cars and the use of synthetic or blends, you should be able to go 7500 to 10K miles now on an oil change.

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    Yes sir, I use the DIC to tend to my oil changes. But these oil change shops are still pushing 3k oil changes, and writing it on the oil change sticker.

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    Yes sir, I use the DIC to tend to my oil changes. But these oil change shops are still pushing 3k oil changes, and writing it on the oil change sticker.

    I use Albert as my "consumer focus group - subgroup: people dumb about cars".... in the nicest way possible of course. Anyone who drives a Honda or Toyota has been conditioned into thinking that when the "Service Required Soon" light starts flashing, then it is time to get an oil change. It could be 3,000 miles or 15,000 miles... they ignore the sticker as long as that light isn't on.

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    Yes sir, I use the DIC to tend to my oil changes. But these oil change shops are still pushing 3k oil changes, and writing it on the oil change sticker.

    I use Albert as my "consumer focus group - subgroup: people dumb about cars".... in the nicest way possible of course. Anyone who drives a Honda or Toyota has been conditioned into thinking that when the "Service Required Soon" light starts flashing, then it is time to get an oil change. It could be 3,000 miles or 15,000 miles... they ignore the sticker as long as that light isn't on.

    Very true and now with GM, Ford and pretty much everyone telling you to just follow the computer for when to get oil changes, etc. If the computer does not tell them, most will ignore the 3K that a grease monkey puts on the window.

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    While the MFG's are trying to make use of the better oils and the better quality engines to make you new car more economical by not having to change oil as often. The problem is it is taking money out of the pockets of oil change shops and dealer service shop.

    The average car owner seldom reads the owners manual because he already knows how to drive the car and set the radio. He has had it beat through his head to change at 3,000 miles but has no idea how good oils are today and how the OLM really works and what all goes into it. Hell I just read the other day a NOX owner though he had too much fuel in his oil so he changed it and now thinks it is running smoother. The truth was he may have just had some bad gas as an oil change would not have fixed the condition he discribed.

    GM should so more to explain the OLM as well as the Dexos deal. I see even many gear heads that do not understand what they are doing here. The fact is many cars in the future will need special oils and the MFG's want to be the ones who decide what they need not the oil companies. Also it add some extra income to a limited degree.

    As for Dexcool there is nothing wrong with it other than the lack of knowledge. Too many people condem it because they may have had an issue but the fact is most people have never had an issue. The fact is you have to keep a good strong mix of this fluid in the system as if it is weak or has air in the system it will sludge up. The tolerance on this product is tighter than the average green prestone. If used properly there is nary an issue with this anti freeze. But then again it is the lack of info from GM on how to deal with it.

    While I blame GM for not passing out the info in a better way the owners also need to accept that todays cars have changed a lot more than they think. Things we used to do the old way do not apply any longer. If you do not read or take training to keep up best to let the pros do it anymore. Case in point the new DI system is not your old fuel injection. There are things to learn and know like how high the pressure is and that many of the lines are one time use and need to be replaced if removes. But some guy at home will try to do it the old way and muck it up.

    Edited by hyperv6
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    The Weight is 211 kg. This is somewhat disappointing. For comparison the LS3 is a mere 183 kg, while the LS7 is 206 kg. Yes, DI, VVT and AFM add weight. But 28 kg = 62 lbs is a lot of weight.

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    I also expect the heads are larger and would not be suprised if the strengthened the block even more. GM has been adding more structure to their engines. In many cases it is worth a little weight.. We will have to watch to see what the parts weigh in at to tell. But the engine is still not bad.

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    The Weight is 211 kg. This is somewhat disappointing. For comparison the LS3 is a mere 183 kg, while the LS7 is 206 kg. Yes, DI, VVT and AFM add weight. But 28 kg = 62 lbs is a lot of weight.

    15% is indeed some girth gain. But if you look into perspective of the Vette's weight that is equivalent to 2%. It would be interesting to see how the car sheds weight.

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      blue-bowtie
      (38 years old)
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    • By William Maley
      Another piece of the 2017 Chevrolet Cruze Diesel puzzle has been revealed. The official EPA numbers have been released and they are quite impressive. 
      Six-Speed Manual: 30 City/52 Highway/37 Combined
      Nine-Speed Automatic: 31 City/47 Highway/37 Combined
      “Chevrolet is dedicated to offering customers a wide range of propulsion options. We know there are customers looking for the right combination of fuel efficiency, driving dynamics, fuel type and more. With the EPA-estimated 52-mpg highway Cruze Diesel Sedan, they can get it all,” said Steven Majoros, director of Chevrolet Marketing in a statement.
      A quick refresher on the Cruze Diesel: it will use a turbocharged 1.6-liter four-cylinder producing 137 horsepower and 240 pound-feet of torque. The sedan will be arriving in the coming weeks with prices beginning at $24,670. The hatchback will get the diesel option next year.
      Source: Chevrolet
      Press Release is on Page 2
      CRUZE DIESEL SEDAN SETS 52-MPG BENCHMARK
      EPA Certifies Segment-Best Highway Mileage DETROIT — The 2017 Cruze Diesel Sedan offers up to an EPA-estimated highway mileage of 52 mpg — the highest highway fuel economy of any non-hybrid/non-EV in America. Based upon the EPA highway estimate, Cruze Diesel with the six-speed manual transmission has an estimated range of up to 702 highway miles on one tank of diesel fuel.
      “Chevrolet is dedicated to offering customers a wide range of propulsion options. We know there are customers looking for the right combination of fuel efficiency, driving dynamics, fuel type and more. With the EPA-estimated 52-mpg highway Cruze Diesel Sedan, they can get it all,” said Steven Majoros, director of Chevrolet Marketing.
      The 2017 Cruze Diesel Sedan features a new Ecotec 1.6-liter inline four-cylinder turbo-diesel engine offering an SAE-certified 137 horsepower (102 kW) and 240 lb-ft of torque (325 Nm). Cruze Diesel passed all stringent U.S. environmental standards and validation, including Tier 3 Bin 125 emissions standards.
      Buyers will be able to option their Cruze Diesel Sedans with either a standard six-speed manual or a new, optional Hydra-Matic nine-speed automatic transmission that includes fuel-saving stop/start technology.
      In addition to its segment-leading EPA-estimated 52 mpg highway fuel economy, Cruze Diesel with the six-speed manual returns an EPA-estimated city mileage of 30 mpg, resulting in 37 mpg combined. Cruze Diesel with the nine-speed automatic achieves an EPA-estimated highway economy of up to 47 mpg and 31 city mpg, which results in 37 mpg combined.
      A suite of connectivity features complements the Cruze Diesel Sedan’s inherent efficiency. These include available OnStar with 4G LTE connectivity and built-in Wi-Fi hotspot and available Android Auto and Apple CarPlay compatibility through Chevrolet MyLink.*
      Pricing for 2017 Cruze Diesel Sedan starts at $24,670 including $875 destination charge. Cruze Diesel Hatch will follow Cruze Diesel Sedan later this year for the 2018 model year.

      View full article
    • By William Maley
      Another piece of the 2017 Chevrolet Cruze Diesel puzzle has been revealed. The official EPA numbers have been released and they are quite impressive. 
      Six-Speed Manual: 30 City/52 Highway/37 Combined
      Nine-Speed Automatic: 31 City/47 Highway/37 Combined
      “Chevrolet is dedicated to offering customers a wide range of propulsion options. We know there are customers looking for the right combination of fuel efficiency, driving dynamics, fuel type and more. With the EPA-estimated 52-mpg highway Cruze Diesel Sedan, they can get it all,” said Steven Majoros, director of Chevrolet Marketing in a statement.
      A quick refresher on the Cruze Diesel: it will use a turbocharged 1.6-liter four-cylinder producing 137 horsepower and 240 pound-feet of torque. The sedan will be arriving in the coming weeks with prices beginning at $24,670. The hatchback will get the diesel option next year.
      Source: Chevrolet
      Press Release is on Page 2
      CRUZE DIESEL SEDAN SETS 52-MPG BENCHMARK
      EPA Certifies Segment-Best Highway Mileage DETROIT — The 2017 Cruze Diesel Sedan offers up to an EPA-estimated highway mileage of 52 mpg — the highest highway fuel economy of any non-hybrid/non-EV in America. Based upon the EPA highway estimate, Cruze Diesel with the six-speed manual transmission has an estimated range of up to 702 highway miles on one tank of diesel fuel.
      “Chevrolet is dedicated to offering customers a wide range of propulsion options. We know there are customers looking for the right combination of fuel efficiency, driving dynamics, fuel type and more. With the EPA-estimated 52-mpg highway Cruze Diesel Sedan, they can get it all,” said Steven Majoros, director of Chevrolet Marketing.
      The 2017 Cruze Diesel Sedan features a new Ecotec 1.6-liter inline four-cylinder turbo-diesel engine offering an SAE-certified 137 horsepower (102 kW) and 240 lb-ft of torque (325 Nm). Cruze Diesel passed all stringent U.S. environmental standards and validation, including Tier 3 Bin 125 emissions standards.
      Buyers will be able to option their Cruze Diesel Sedans with either a standard six-speed manual or a new, optional Hydra-Matic nine-speed automatic transmission that includes fuel-saving stop/start technology.
      In addition to its segment-leading EPA-estimated 52 mpg highway fuel economy, Cruze Diesel with the six-speed manual returns an EPA-estimated city mileage of 30 mpg, resulting in 37 mpg combined. Cruze Diesel with the nine-speed automatic achieves an EPA-estimated highway economy of up to 47 mpg and 31 city mpg, which results in 37 mpg combined.
      A suite of connectivity features complements the Cruze Diesel Sedan’s inherent efficiency. These include available OnStar with 4G LTE connectivity and built-in Wi-Fi hotspot and available Android Auto and Apple CarPlay compatibility through Chevrolet MyLink.*
      Pricing for 2017 Cruze Diesel Sedan starts at $24,670 including $875 destination charge. Cruze Diesel Hatch will follow Cruze Diesel Sedan later this year for the 2018 model year.
    • By William Maley
      About two years ago at the SEMA show, Chevrolet showed off a collection of vehicles with a concept trim package known as Red Line. The vehicles featured a number of trim pieces finished in black and red to give off a sinister look. The reaction to these concepts was positive, causing Chevrolet to investigate whether or not to bring this into production.
      This morning, Chevrolet revealed the Redline special edition. This brings a set of black wheels with red hash marks, blacked-out grilles, black Bowtie badges, and black nameplates with red outlines. Chevrolet mentions that each model in the Redline lineup will have their own exclusive touches. For example, the Silverado and Colorado will get red tow hooks.
      Chevrolet will offer eight Redline special edition models. Aside from the Silverado and Colorado, Redline will be available on,
      Cruze LT (sedan and hatchback) Malibu LT Camaro LT/SS (coupe and convertible) Trax LT Equinox LT Traverse Premier Chevrolet says you can order the Silverado Redline right now. Other models will be available later this year.
      Source: Chevrolet
      Press Release is on Page 2
      REDLINE TAKES CHEVROLET DESIGN TO THE NEXT LEVEL
      Broadest cross-portfolio special edition offers customized vehicles right from the factory CHICAGO – Today, Chevrolet announced the introduction of the Redline special edition series at the Chicago Auto Show. Available on nine Chevrolet cars, trucks and crossovers, Redline is the broadest cross-portfolio special edition ever offered by the brand.
      Redline made its debut in concept form at the 2015 SEMA Show in Las Vegas. Inspired by a strong positive reception from customers and the success of special editions across the portfolio, Chevrolet expanded Redline across nine vehicles in the car, truck and crossover segments:
      Cruze LT (sedan and hatchback) Malibu LT Camaro LT/SS (coupe and convertible) Trax LT Equinox LT Traverse Premier Colorado LT Silverado Double Cab LT Z71, Crew Cab LTZ Z71 “Redline is another example of Chevrolet bringing SEMA concepts to showrooms,” said Brian Sweeney, U.S. vice president of Chevrolet. “The SEMA show has proven to be a great way to identify customization trends in the industry, and quickly apply those trends to our most popular Chevrolet models. Based on the strong interest Redline attracted at the show, we believe they will be very popular with customers looking for standout cars, trucks, and crossovers.” 
      All Redline vehicles are equipped with black wheels featuring distinct red hash marks, black nameplates with a red outline, blacked-out grilles and black Chevrolet bowtie logos.
      From there, vehicles feature design elements tailored to the preferences of those specific customers. For example, the Silverado and Colorado Redlines feature red tow hooks, while Camaro Redline features unique black hash marks above the wheels, a design cue taken from Chevy’s long heritage in motorsports.
      “Our special edition lineup has been popular with customers and dealers, alike” said Sweeney. “Since the introduction of special editions on vehicles the like Silverado and Camaro, vehicle average transaction prices have increased, time to turn has decreased, and conquest rates have risen, which has contributed to making Chevrolet the fastest-growing brand in the industry two years in a row.”
      Silverado Redlines are the first available for purchase; orders can be placed at Chevrolet dealerships now. Availability will be cadenced, and all Redline vehicles will be available for purchase by the end of 2017 calendar year.

      View full article
    • By William Maley
      About two years ago at the SEMA show, Chevrolet showed off a collection of vehicles with a concept trim package known as Red Line. The vehicles featured a number of trim pieces finished in black and red to give off a sinister look. The reaction to these concepts was positive, causing Chevrolet to investigate whether or not to bring this into production.
      This morning, Chevrolet revealed the Redline special edition. This brings a set of black wheels with red hash marks, blacked-out grilles, black Bowtie badges, and black nameplates with red outlines. Chevrolet mentions that each model in the Redline lineup will have their own exclusive touches. For example, the Silverado and Colorado will get red tow hooks.
      Chevrolet will offer eight Redline special edition models. Aside from the Silverado and Colorado, Redline will be available on,
      Cruze LT (sedan and hatchback) Malibu LT Camaro LT/SS (coupe and convertible) Trax LT Equinox LT Traverse Premier Chevrolet says you can order the Silverado Redline right now. Other models will be available later this year.
      Source: Chevrolet
      Press Release is on Page 2
      REDLINE TAKES CHEVROLET DESIGN TO THE NEXT LEVEL
      Broadest cross-portfolio special edition offers customized vehicles right from the factory CHICAGO – Today, Chevrolet announced the introduction of the Redline special edition series at the Chicago Auto Show. Available on nine Chevrolet cars, trucks and crossovers, Redline is the broadest cross-portfolio special edition ever offered by the brand.
      Redline made its debut in concept form at the 2015 SEMA Show in Las Vegas. Inspired by a strong positive reception from customers and the success of special editions across the portfolio, Chevrolet expanded Redline across nine vehicles in the car, truck and crossover segments:
      Cruze LT (sedan and hatchback) Malibu LT Camaro LT/SS (coupe and convertible) Trax LT Equinox LT Traverse Premier Colorado LT Silverado Double Cab LT Z71, Crew Cab LTZ Z71 “Redline is another example of Chevrolet bringing SEMA concepts to showrooms,” said Brian Sweeney, U.S. vice president of Chevrolet. “The SEMA show has proven to be a great way to identify customization trends in the industry, and quickly apply those trends to our most popular Chevrolet models. Based on the strong interest Redline attracted at the show, we believe they will be very popular with customers looking for standout cars, trucks, and crossovers.” 
      All Redline vehicles are equipped with black wheels featuring distinct red hash marks, black nameplates with a red outline, blacked-out grilles and black Chevrolet bowtie logos.
      From there, vehicles feature design elements tailored to the preferences of those specific customers. For example, the Silverado and Colorado Redlines feature red tow hooks, while Camaro Redline features unique black hash marks above the wheels, a design cue taken from Chevy’s long heritage in motorsports.
      “Our special edition lineup has been popular with customers and dealers, alike” said Sweeney. “Since the introduction of special editions on vehicles the like Silverado and Camaro, vehicle average transaction prices have increased, time to turn has decreased, and conquest rates have risen, which has contributed to making Chevrolet the fastest-growing brand in the industry two years in a row.”
      Silverado Redlines are the first available for purchase; orders can be placed at Chevrolet dealerships now. Availability will be cadenced, and all Redline vehicles will be available for purchase by the end of 2017 calendar year.
    • By William Maley
      It is a good time if you happen to be interested in off-road pickups. The Ford F-150 Raptor, Ram Power Wagon, and Toyota's TRD Pro lineup offer their unique take. Soon, the 2018 Chevrolet Colorado ZR2 will have its own take for your consideration.
      Today, Chevrolet revealed the base price of the Colorado ZR2 which begins at $40,995 (includes a $940 destination charge). That will net you the extended cab model with the 3.6L V6. Chevrolet isn't talking pricing for the crew cab or the option of the 2.8L Duramax Turbodiesel. This price undercuts the base Toyota Tacoma TRD Pro by $705.
      The list of standard equipment is quite extensive with front and rear locking electronic diffs, DSSV dampers, a 2-inch suspension lift, new bumpers, spray-in bedliner, 31-inch Goodyear Wrangler Duratrac tires, aluminum skid plate, six-speaker audio system, 8-inch touchscreen with Chevrolet MyLink, and wireless phone charging.
      Source: Chevrolet
      Press Release is on Page 2


      CHEVROLET ANNOUNCES 2017 COLORADO ZR2 PRICING STARTING AT $40,995
      Chevy’s all-new off-road performance truck will be priced more competitively and have better standard equipment than the nearest comparable vehicles DETROIT — After revitalizing an entire truck market segment with the launch of the Chevy Colorado, Chevrolet continues to innovate in the midsize pickup segment. The high-performance, off-road ZR2 trim level will launch this spring for the 2017 model year with a starting price of $40,995 MSRP including a $940 destination fee.
      “ZR2 is truly a segment of one and does everything well — from traversing heavy two-track trails to high-speed desert running and full-on rock crawling. We’re thrilled to be able to offer it for more than $2,500 less than the next closest comparable vehicles. Taken in the context of serious off-roading, $2,000 will buy you 50 years of annual passes to Arches National Park in Moab, Utah,” said Sandor Piszar, Chevrolet Trucks marketing director.
      “Some vehicles that customers might cross-shop with ZR2 can spec out as much as $26,000 more than our truck — or the price of a well-equipped 2017 Colorado. When you buy a ZR2 at the starting price of $40,995, you are getting all of the significant off-road technologies standard with the vehicle, as well as an eight-speed automatic transmission and a wealth of other features at no additional cost.”
      Available options on the 2017 Chevrolet Colorado ZR2 will include:
      Class-exclusive 2.8L Duramax Turbo-Diesel engine, paired with a six-speed automatic transmission, capable of 186 horsepower and 369 lb-ft of torque Choice of crew- or extended cab configurations (including short and long beds, respectively) 7-speaker Bose premium audio system Dealer-installed, bed-mounted spare tire carrier Full-length black vinyl floor (no additional cost — standard interior features leather seats and carpet) The ZR2’s starting MSRP includes a number of key standard features unique to the trim level, such as:
      Class-exclusive front and rear locking electronic differentials Revolutionary, segment-exclusive Multimatic Dynamic Suspensions Spool Valve (DSSVTM) dampers Off-road rocker protection Modified front and rear bumpers for better off-road obstacle clearance Exclusive ZR2 17 x 8-inch aluminum alloy wheels 31-inch Goodyear Wrangler Duratrac off-road tires New cast-iron control arms An aluminum skidplate that protects the radiator and engine oil pan Autotrac transfer case Transfer case shield Aggressive grille and hood combo unique to ZR2 Modified rear axle with a 3.42 ratio Front and rear tracks widened 3.5 inches over a standard Colorado Suspension lifted 2 inches over a standard Colorado Off-Road Mode Technology 4-wheel disc brakes Other standard features include:
      Tow/haul mode Trailering Package, including trailer hitch and 7-pin connector Integrated trailer brake controller Spray-on bedliner Heated driver and passenger front seats Wireless phone charging Rear sliding window EZ Lift and Lower tailgate Locking tailgate Recovery hooks A six-speaker audio system with Chevrolet MyLink Radio with Navigation and an 8-inch diagonal color touchscreen, AM/FM stereo with seek-and-scan and a digital clock, Bluetooth streaming audio for music and select phones, voice-activated technology for radio and phone featuring Apple CarPlay and Android Auto capability as well as an auxiliary jack All-terrain spare tire with unique ZR2 wheel Four USB ports: one on the instrument panel, one in the center console and two in the rear of the center console Electronic automatic cruise control Rear window electric defogger OnStar 4G LTE with built-in Wi-Fi Rear Vision Camera Remote keyless entry Remote vehicle starter system 4-way power front driver and passenger seat adjuster with power driver lumbar control Rear seats with underseat storage Standard powertrain is the 3.6L DI DOHC V6 with a class-leading 308 horsepower and 275 lb-ft of torque that is shared with other Colorado models.
      The ZR2 is available only as a four-wheel-drive vehicle.
      The 2017 Chevrolet Colorado ZR2 goes on sale this spring.

      View full article
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