quote:Originally posted by ADFD1:
Tim you said this: Where has he proven it? And if so, why don't the 2 cycle and auto manufacturers recommend it?
If everyone listened to the auto manufactures they'd use API certified oil. That would hurt sales of SSO and ASM since Amsoil won't pay for the certs. They just claim it exceeds it.
None of the auto manufacturers state that it is required to use API certified oil for vehicles in the US. AMSOIL has 8 API certified oils for those who feel that is important. Several API certified oils failed API certification tests when pulled from the shelf. None have ever been AMSOIL. Plus AMSOIL warranties their oil for all lubricated parts and labor should their oil ever fail (it never has). Nor has it ever voided a factory warranty, even with extended oil change intervals.