ok, i last put Mobil 1 motorcycle oil in my bike, but its time to change it again-
my question is- is there really any proof that AMSOIL is the best **** there is?
or does anyone have any other reccomendation for me?

 

check out their website, they have a lot of scientific comparisons that really make their point. The difference between any of the better synthetics out there isn't really important though, they are all going to guarantee your engines safety and the highest level of performance. It comes down to price and brand loyalty for most. The only thing Amsoil really has on the competition is their extended drain intervals and synthetic filters.