Quote:
Originally Posted by Vigilante375
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.
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This is a stupid take. Use 0W40 on all model years. It's the exact same engine.