As far as i know, its completely standard. Standard airbox, wheel s, the lot. I too have been told that imported/jap vehicles run better on super unleaded than unleaded. My mate, who has a Almera GTI also notices the difference(He's a mechanic, so i hope he knows what he's talking about lol). He reckons the car doesnt run as good as it should with unleaded. He'll only use super. I certainly feel a difference too. The majority of people i know with imported cars also think this way which is quite confusing if its all just a myth. sorry for being so niave but its just strange when so many people think/know the same way.