Probably Amsoil, Redline, RP, any of the boutique oils. I'm sure they are great, but the cost is too much. My driving style is pretty laid back, 95% highway. I've been using havoline, pennzoil and pure-guard and been very pleased. I don't like the MLM of Amsoil either, though I did see it being offered at Runnings F/F. I don't understand why such a great oil is marketed that way, not something I gravitate to.