Over the holidays i put the 10-30 amsoil into my dad's 944 in order to see if we like it. This is our daily commuter to work, so the miles should rack up quick. I have run amsoil before in this car but it was the 7500 series. I think this one should do better but who knows. I will say that my initial impression is that it feels smoother over mobil and the slight valve tap that's been audible for the past 15k miles is still there but is quieter.
