Thanks Al, I used the HP injector for many years in 2-strokes and have discussed the lack of certification with several Amsoil reps.
When it comes to a warranty claim costing the mfg several thousand dollars for parts/labor, I'm sure some won't hesitate to dispute what type of lubrication was used.
The quality of the Amsoil is probably better than any of the motor brand oils, but that is not the point. The motor mfg. state the lubricant requirements and those have to be adhered to maintain the warranty.