my friend tried AMSOIL 0w30 on his 99 camry twice, around 6k-7k and send the oil sample to a third-party testing institute. the results were all good, the oil was still very clean and useable. i didn't believe in him, i was just like flyromeo3 back in that time my friend showed me his AMSOIL testing but it looks like it's customers proven....
the only thing that i don't understand is that if it's so good that can beat every other oil maker in the market, why they never show up even once on national tv? or some retail stores like pepboys, autozone?