I am currently using Redline Synthetic oil. Some say that I wasted $50, but I don't think so. I am in the devil's land, here in Phoenix and it gets f'n hot. It is supposed to be the best oil made, bar none. I hear that Amsoil and Royal Purple have products that come close. The better oils have longer change intervals. I heard someone say that you can run Redline for 50k miles... I would't try it, but I will go over 5k. The oil debate might as well be Theology... Some people swear by Valvoline, but I wouldn't lube my lawn mower with it.
