Quote:
Originally Posted by thecrewdawg
I have a 2018 ZL1 M6. My son is a salesman at the dealership that I purchased the ZL1 at. He just told me that the service tech that I usually deal with informed him that GM has changed or "updated" the oil requirements for the ZL1 from 5W30 to 10W40. Has anyone heard of this?
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Go off of what your owners manual says. GM updated it in late 2018 early 2019 to 0w40.
Did they send it a letter telling owners that the new recommend oil was that? No.
5w30 is the recommend oil for 2017 - 2018 ZL1s and still is.