Originally Posted by Navysesal
I run mobile 1 5w-30 advance synthetic with a kn filter
Would you recommend 5w-40 Rotella T6? For some reason all the Subie guys around here live by it. But it's against the recommended weight on the Subaru cap and it's typically used in diesel trucks so thr doesn't sound like the right option but of course I know nothing about oil. I do drive about 50% "spirited" at mid to high rpms.