I am not quite so negative, You will need the normal amount of oil, which is the biggest cost of fuel anyway. You can try E 85 gas if available in your area too. Maybe try running your motor at full throttle to get the mixture right and then adjust for idle. Maybe the taper on the idle needle needs a more gradual taper. Tell us the results. Maybe someone will figure it out. Myself, I would like to at least use less oil, as that is the biggest cost, and also loss of power. As mentioned needle bearings are normally used in two strokes using gas.