I've got a pretty fresh 306 in my coupe and never really thought about it before but what weight oil is everyone runnin thru the year? i started with 20w50 and right now its got 10w40 in it cuz its all we had around the shop but im thinkin about goin back to the 20w50 for the warmer months. so jw what everyones runnin in their cars. thanks