The API issue has come up time and time again (old news). From the past users, to the tests, I do not think this is an issue. If you know the API sets limits on certain areas in the oil in which you want. I for one want more P, Zn and Ca in my oil. For me the API cert means zero to me. If you want or need an API cert on a bottle then buy that oil.
Example, there Xl-series oil WAS a group 4 PAO without API cert. Now the XL series uses a group 3 dino oil and is API cert. The complete add. pkg had to be lowered and less expensive base stock were used. So take the API for what it is worth....
The Super UDT spec covers MORE the hyd specifications as I was told. So the fluid (super UDT) must pass hyd criteria and other criteria (etc.engine, gears etc) within the same Super UDT spec.
Based on their [Amsoil) oils, they have no reason to lie since there name is on the line.
Example, there Xl-series oil WAS a group 4 PAO without API cert. Now the XL series uses a group 3 dino oil and is API cert. The complete add. pkg had to be lowered and less expensive base stock were used. So take the API for what it is worth....
The Super UDT spec covers MORE the hyd specifications as I was told. So the fluid (super UDT) must pass hyd criteria and other criteria (etc.engine, gears etc) within the same Super UDT spec.
Based on their [Amsoil) oils, they have no reason to lie since there name is on the line.