Engine doesn't leak to any degree. I stuck a tube sock and a rubber band over the draft tube and ran about 10 miles at 60mph and 2800rpm. No amount of oil on the sock bigger than a 3/4'' circle and it was just barely enough to get onto your finger. My tail pipe is black. Spits what I believe is unspent fuel out the tail pipe on start up and until it is warm but doesn't seem to smoke when reved up or driving after warmed up. Again when driving at lower rpm it consumes no oil.
