Guys, I think I've hit rock bottom, and need (as pscholte so eloquently said) "good counselling." Little bio on the car in question, it's a 1999 BMW 328i. So that makes it an I6. Manufacturer requires A3 rated oil. Thus far I've been using the elixir of life during the winter time (GC) and M1's 0W40 during the summer time. I've now just tried Motul's 5W40 and am quite pleased with it. But, I think I've smelled too much of the Motul oil during the oil change, because now I want to try 0W20 this winter, and possibly all year round. Help.... I need someone to knock some sense into me.