smp142 gets a cookie! depending on how many miles and yadda yadda yadda, you wanna run a thicker oil. depending on where you live. iirc, car craft did a story on oil cuz of cams and shit like that failing. using rottela in a gas engine wont hurt you at all. over time it might make the cat a lil dirty, but hey. thats what your turbo is for.
