A guy on the 911 tests fuels as part of his job (something to do with motorbike racing in a superstock type class) not just for power they examine all engine parts and exhausts etc as well as power and the ONLY fuel he will put in his 996 turbo is (by choice) Momentum !!!!! Im sure it was Ian Litchfield who I was discussing just this with who said that they get most power on 'some' momentum cars with V power being most repeatable.
I only use momentum by choice or 102 in Germany.
I came into this world screaming and covered in someone else's blood, I have no problem leaving the same way !