Originally Posted by FocusBoy58
5w40 mobile 1 synthetic with 1quart of Original Lucas Oil Stabilizer, Turbos like to leak with thin oil. Never had an issue. If you want best gas mileage sure run 5w20
you want protection for your investments then put thicker oil.
I dont agree that 20wt gets better MPG then 30wt or 40wt, and my opinion is things like lucas and rp is its not worth running
I build a LOT of race engines and a lot of the competition runs things like lucas , rp etc and they dont run as long or longer then the guys running std Syn oils