Acetone rules!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
or Xylene
surprised my dad too put a quart to 10 gals in his 89 318 lebaron and he asked my what did i do tune it up or something its smoother more responsive and his trips to the beer distributor only take one tank of gas every 3 weeks instead of 2 weeks. I showed him and he calculated the btu content and said why didnt i think of that. hes a retired aerospace engineer.