whats the difference between all the 15w50 oils that mobile one makes then?
not many people run a 15w50 in the subarus that i have heard of. i dont know if its a bad thing or not. being in a cold climate i cant see a 15w being good but in a warm climate its probably not a bad thing.
and i said 15w50 is heavy but it is a bit thicker than 5w30 no?