Directory:Acetone:Rumbolt's 2-Stroke - PESWiki
This corresponds to
3oz/10 gal.
The first thing I noticed was an immediate increase in idle rpm by 1000rpm! I had to reset the idle screw. I also noticed that the mixture screw had to be reset for max rpm. I had to close it a bit.
I have now had a half dozen flights with acetone in the fuel. Further, the fuel has been allowed to sit in the plastic tank for 3 weeks with no apparent degradation.
My paramotor typically uses about 1 gal of fuel per hour of flight. Last night I flew for 0.9 hr and used only 1/2 gal of fuel!
(90% gain?) I have also noticed a 1000rpm increase in max rpm while flying. This means more power!
Usually after a flight, I have to wipe the oil off the prop. (The unburned exhaust goes thru the prop.) I have seen a dramatic decrease in oil on the prop, indicating better burning of the fuel.
The spark plug is showing a good brown coloring, and I have seen no carbon buildup on the piston. Carbon buildup is typical of these engines.
In short, I have found acetone to be beneficial in small 2 stroke engines too!
GP-7 2-stroke racing oil
GP7 has PIB which has been documented to increase mpg for 2 strokes. Not cheap though.
PIB = polyisobutylene?
....