well i've been doing the acetone thing for the last 7 fill-ups and i found 1 oz to 10 gal works best for me.
i have a completely stock engine with 130K on it, 2.73 gears, T5, and 225's at 38 psi. on this last tank i drove 310.8 miles, 289.2 highway at around 70mph, so pretty much all highway (93%), and only "got on it" 3 times. well here's the shocking part.... my gas mileage was 26.6 miles per gallon. that's pretty good in my book. my average mileage before acetone (5 tanks without) was 21.5, now my average mileage is 25.4. now if gas prices would go down, i'd be really happy.
i have a completely stock engine with 130K on it, 2.73 gears, T5, and 225's at 38 psi. on this last tank i drove 310.8 miles, 289.2 highway at around 70mph, so pretty much all highway (93%), and only "got on it" 3 times. well here's the shocking part.... my gas mileage was 26.6 miles per gallon. that's pretty good in my book. my average mileage before acetone (5 tanks without) was 21.5, now my average mileage is 25.4. now if gas prices would go down, i'd be really happy.