Club has a j160c which was using up yo 150 ml of oil per hr. Our lame mechanical engineer stripped top end and torque plated barrels and heads for honing and valve face cutting because of distortion. Minor work on rocker arms sorted guide wear. These jobs have been done without going out of jabiru specs. It has been a journey but we are getting things sorted. It has done over 200 hrs since top end overhaul .