I have readed about adding acetone to the fuel, and having some here at home I give it a try, my 94 Trooper where doing about 240 miles per tankfull, now I;m geting about 280, I'll keep pouring acetone (wich is a big part % in every fuel treatment).
I'm using 1 pint per tankfull (about 20 gal), engine runs smother and reacts quicker (not a hot rod), also step on the gas very ligthly and try to not use the brake (thats how much before the red light I remove the foot from the pedal), I use the cruise control as much as posible and even had a couple short (40 miles) runs towing my sea doos's or the Rodeo around.
Engine oil is Mobil1