Ok...My car has been running Mobil 1 oil since day one (oil changing records prove it) and it still runs great. But, I have been looking at using Amsoil because it can go longer, is thiner in cold weather (we do see -60 were I live), and it is slightly cheaper than Mobil 1. Should I give the Amsoil a shot or should I just stick with the Mobil 1? Thanks!
