oil
Burning Brakes
Joined: Aug 2006
Posts: 1,155
Likes: 0
From: San Diego California
Not using it. Probably no significant advantage anymore for flat tappet cams, because even the Rotella has had the zinc reduced. I use 5W30 or 19W30 dino oil, with a break in additive like EOS.
CF Community Team
Joined: Oct 2004
Posts: 19,361
Likes: 5,243
From: Cape Cod, Mass.
2025 C6 of the Year Finalist - Unmodified
2025 C8 Z06/7/E-Ray of the Year Finalist - Unmodified
2023 C3 of the Year Finalist - Unmodified
2021 C8 of the Year Finalist Unmodified
2020 Corvette of the Year Finalist (performance mods)
2019 C1 of Year Winner (performance mods)
2017 Corvette of the Year Finalist
2016 C2 of Year
2015 C3 of Year Finalist
. While the levels are reduced any API service rated CJ-4 or CI-4 is still sufficient for these old motors.
