Over the years, I have used most all of the oils for dirt bikes, like Castrol, Klotz, Belray, and even the Honda stuff in gas engines, both bikes and aircraft, with zero problems. Having read the SAE tests, and seen the data, I have no reason not to use Amsoil. It's just that it is far superior to all conventional oils, and on top of the heap as far as synthetics are concerned.

Vince