Just wondering what the "average" is. Mine was (i can only assume) filled at the first service at 640 miles. It is now on 1450 miles (scary - 3 weeks riding!) I had to fill from just over minimum to max, which was approx 350 ml of oil. I dont think this is too bad at all really - makes about a litre in 2500 miles. is it likely to start using less now??? or more? now its looser.