SAE 10W-40: Meets the toughest industry standards for volatility protection. It delivers maximum viscosity protection, provides a higher level of thermal stability, reduced harmful deposits and provides superior wear protection. Meets API SM, SL and the engine protection requirements of ILSAC GF-4, GF-3.
There was a time when I would say the Schaeffer Supreme 7000 blend would be the best value. Now, the data sheet still shows A3, but they lowered the HTHS.
I finally got the hood open on the 200k CGT. After 4000mi w/OT up to 170c(!), it only used 10-12oz. Not bad, I don't wanna hear any more comparisons to conventional oil. I topped with T&SUV, did not want to buy a 'nother whole jug. For engines that can't really use a HDEO 40wt, this oil is a good pick.