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What are you talking about? They’re new. Just because they use the same displacement as an engine from 1996 or the 1960s doesn’t make them old

You’re now only putting in 50kw (plus or minus some from charging losses)

There have been plenty of studies done and I will post them here if your interested in the pure science. End result is that depending on the EV manufacturer, some loose range faster than others. Yet for the most part, EV battery packs will last far longer than the fear of the ICE folks are trying to say you will pay for. Pure science EV Battery Degradation Assessment Under Standard Drive Cycles Using Simulated EIS Lithium-ion battery degradation: Comprehensive cycle ageing data and analysis for commercial 21700 cells - ScienceDirect Early prediction of lithium-ion battery degradation with a generative pre-trained transformer | Nature Communications Battery Lifespan | Transportation and Mobility Research | NLR Reports based on outside the US studies: The EV Brand With The Slowest Battery Degradation Isn’t Tesla New study of 1,300 EVs busts battery degradation myths, Kia and Tesla top the list | Electrek Kia beats Tesla in battery capacity retention over time as used electric vehicles exhibit remarkable longevity - Notebookcheck News https://internet-satelitarny.eu/2025/10/31/new-mega%E2%80%91study-of-1300-used-evs-just-blew-up-the-battery%E2%80%91degradation-myth-heres-who-tops-the-list-hint-not-tesla/ Yes, they are new engines with old displacements and marketing that I find funny as I think due to all the V8 issues GM has had especially in the States where they say to use 0w-20 and yet for the same engines outside the country they say to use 5w-30 GM seems to be spinning to take hold of their old reliability that folks remember from the 80's and 90's here. Just my own take on how I am seeing things as GM tries to get in front of their engine issues.