Quote:
Originally Posted by Vigilante375
When the oil pumps started failing, were for the year models that GM recommended 5w30, not 0w40. 0w40 came out as the official oil for street and track use (for non 1LE ZL1's) in late 2018 for the 2019 year model.
I didn't know the oil pump was from a Cruze. Is this true for the LT4 in the CTS-V and Z06? If it is, then why are did the ZL1 oil pumps fail but not the CTS-V or Z06 oil pumps when they use the same oil?
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I agree. I change my oil to 0W4 when GM made the change in 2019. They just didn't decide to make that change out of the blue. At 38k miles, I still had no pump failure. I did have my pump changed out to a Katech anyways.
I am not si sure about the CTS-V, but the Z06 was a dry sump, so it would have never of had this issue.