When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
10W30 in 1984 and 1985. 5W30 for 1986-1991 L98. 1990 ZR-1 had dino oil 10W30. I don't know what oil was in other year ZR-1. Mobil 1 became factory fill in 1992 with the LT1.
I was more referring to what brand rather than what weight what used. So pretty much just AC Delco dino oil.
Beginning with the 1992 LT1 engine, the Assembly Plant used Mobil-1 5W-30 full synthetic oil. A Mobil-1 label was also affixed to the underside of the hood just above the air filter. I don't check much of anything in the C8 section, so does the C8 engine use Mobil-1 full synthetic??
For whatever reason the LT5 engine in the early ZR-(1990 thru 1995)1 did not get a full synthetic oil. I think the oil viscosity was 10W-30.
Right out of the owners Manuel, I would refer to the appropriate year for your Corvette. As long as the oil meets the manufacture standards it should be just fine.
