If a new car or truck of mine the first oil change gets done around 1,500 mi. to get the factory fill "break-in" oil out. I know engines are "broke in" at the factory now, but there are still piston rings to seat completely and main bearings to fully set and I like to get Mobil 1 Fully Synthetic in ASAP, it really does make a difference. GM Dexos oil is decent, but it's a blend of conv./syn. All Corvettes come from the factory filled with Mobil 1 Full Syn. since at least the first C5's in '97 so it wasn't as much of an issue, but both the C5 and Silverado get Mobil 1 Full Syn. and Wix XP Syn. compatible oil filters every 6 mos. or 6000mi. that's about when the OLM system is at 10% left although I'm a bit over 6 mos. in both right now because the miles are lower than usual and oil life is still at 25% in the Silvy from oil change in May for obvious reasons (Kung Flu). I change the Silvy myself no floor jack even needed and can easily fit under with a creeper, it's fun and I like to look around and check everything else out underneath myself because I care about my truck more than some kid making $12/hr. Since you can't fit a floor jack under a Corvette I take her to a big Corvette Chevy dealer where they actually have the mechanics change the oil on the Vettes. There are very specific points marked "lift here" on the hidden frame rails to setup a 2 post lift for Vettes, even a 4 post ramp lift can get tricky so the oil change kids are a "I don't think so son".
We've unfortunately recently seen what can happen if an untrained service dept. minion tries to lift a Vette, like that new C8 that fell off one recently that wasn't setup right. That's just an irresponsible lift operator and not at all acceptable from any SAE Certf'd. dealership. It's a general safety rule to check, double check then triple check the lift points before you start the hydraulic rams to lift any car.