Originally Posted by flyby
Well, I use Royal Purple. I also still use Z-Max. Let's see in oh ten years who has more out of pocket engine expenses. Bet I win. Many people have knee-jerk reactions. Mine are based on pure science and testing. Yes extensive testing. For a few dollars, more horsepower, lower friction, longer engine life, better gas mileage. I will continue spending a little more for a lot of benefits.
I would be willing to take that bet with you...
I use Amsoil based on scientific tests, studies, and personal experiences. It has treated me well and is the only oil I wold recommend, no additives needed. It blows RP out of the water, Mobil 1 is the only oil close to comparing to it.