I thought this stuff sounded so good, too! I was using it in my 12psi turbocharged Miata, which has approx 220hp at the wheels. Mostly a daily driver, I do take it for lapping sessions at the local tracks. The problem is consumption, and the consumption pattern. I just got back from a 5000mi road trip over which I consumed about 1.5qts of oil. Not a lot, but there was no consumption for 1100 miles then I started losing it. 15w50 never did this, so I'm going back to a 50/50 blend of that and 10w30. Cheaper, too.
Robert
Robert