Originally Posted by benc
I believe the warranty on my Yamaha engines are void if I put any oil in the petrol. I have to use the auto mix!
I will check that though!
I thought the general recommendation was to run through a tank of pre-mix if you have had any work done on the engine (or it's been sitting for an extended period). Air bubles can get into the oil injection system and even with it primed, a small air buble could cause damage if it meant a cylinder wasn't getting oil.
To answer an earlier question, my old Suzu had an oil flow meter as well as tank sensor to check the oil was actually getting to the engine - was before the pump tho so didn't actually check that oil was going to all 3 cylinders!