My new GM says it needs oil with Dexos. So the Oil change places tell me I have to go for at least semi-synthetic.
It’s a scam. When gm dealer changed oil, they used regular oil, thier minimum requirements which includes Dexos.
I go look at Canadian tire and even Walmart, ALL regular oil now says includes Dexos and meets warranty requirements.
So, do jiffy lube and minute lube, penzoil and others, specifically go out of thier way to make oil that doesn’t meet warranty requirement, just so they can sell upgrades? Hmmm, sorry to say, but reminds me of some sp’s, take stuff off the menu so they can sell upgrades.
When I had the ZL1, I always changed oil myself, always used good oil with Dexos. I didn’t trust anyone to do it right, and it had an underplate to remove, so anywhere would charge extra.
Now with the new car, V6, overhead cam, all wheel drive, I just drive inn and let them change it.
Every car I’ve had takes 5W-30, since 1988. I change when the indicator gets down to 30-25%, and that’s about 8k km.
So far it hasn’t been down even 1/2 litre.