this will some absolutely ludacris to most people, because IT IS! i cant help changing my oil like every 500-1000 miles with synthetic oil! its free, so why not, i like to change oil, and there is no chance of having oil go bad! its outragoeous! i have a sickness! please help! i use mobil 1 tri-syn 0w-40! i change it because it makes me feel good and its fun to change. this site has made me MORE of a fanatic! im completely crazy now!