Per the cap on the vehicle, it takes 0w-40 for the 6.2L motor. Our oil distributor says they don't carry that, and I have no GM # for it. When I look at SI or the catalog, it says it takes Mobil1 0w-40 (19370233). The only problem here is on the warranty oil changes our service department ends up having to eat alot of money because they don't pay for Mobil products. What are all of you using for these situations? Thanks in advance...
Cain