I dont care either way. This UOA was older. I flushed the engine after this one was taken and running Amsoil SS Max Duty 5w40 fixing to do a change at 6,000 and send it off. I do know for a fact that 6,000 on T6 I would have a quart to add quart to quart and half between changes. The Amsoil I have not had to add a drop during this 6,000 mile run. Curious to see how it did.