I know this acetone has come up a lot but I tried this new twist & it seems to work even better 2 oz acetone 2 oz xylene 2 oz synthetic 2 cycle oil ..... I gave it a try & went 98 miles on 3.6 gallons of gas that’s on a 99 GT automatic with 145,000 miles 63 miles was highway & the rest city I tried to keep it under 65 mph & was running 37 psi in my tires at $4.40 a gallon any safe trick is worth a few gallons ! a few fill-ups pays for all the materials