I have been using acetone occasionally for 10 yrs. It is what's in injector cleaner, only it is $15 a gallon at napa. Add some zxylene for good measure. Should get better mileage too if you don't get heavy on the throttle from the extra power you get. Look it up under La pointe on net. He has been using it for 50 yrs. 3 OZ per 10 gallons of fuel for better mileage. Any more and you get worse mileage and maybe a burnt valve. Techron is good too. Acetone is 150 octane.