Ask Your Stickiest Question. . . Or ask us something you’ve always wanted to know about using our products. We’ll sort through all the submissions and present the best questions to our automotive experts. We'll share the questions and their answers here.
Best Oil for Street Legal Drag Car
Dear Mobil 1, I race a 700hp drag car that is street legal. The motor is a 505c.i. BB Mopar with solid lifter cam with .674 lift. I am currently using the Mercedes-Benz SLR spec Mobil 1 5W-50 oil. (9 quarts and a Mopar race filter). I change it every 25 1/4-mile passes or 500 street miles due to the extreme rpm and 13.5/1 compression ratio and the solid lifter cam. It comes out dark but just short of black. Is there a better oil that I could use in this application? The SLR spec oil has been working great since I changed to it and I have not a problem. Prior to the Mobil 1 I was using a conventional Valvoline 5W-50 race oil but kept getting high oil temps. Thanks.
-- Dallace Brandon, Placerville, CA
If it isn’t broke don’t fix it. Stay with the product you are using and having good results with. However, if you want to see if you can get a little more power (who doesn’t), we recommend you try Mobil 1 Racing Oil 0W-30 introduced in spring 2009. It will provide a boosted level of ZDDP for outstanding protection of the solid lifters.