Probably M1 5w-40. 11hp increase with Eneos 5w-40. I guess it's possible. I'm usually a huge skeptic of these tests, but you never know.
Many brands claim Hp increases, Royal Purple especially. The only other valid test I've seen comparing oils on the Dyno was done by Joe Gibbs Racing. That test compared RP, M1, Redline and JGR oil in a Busch Nascar engine. Redline often claims hp increases yet with their very high shear stability, produced less hp in their testing.
Supposedly Toyota brand 0w-20 is made by Eneos. I should give it a shot. My car could use a few extra hp.