Originally Posted by wermbang
I use 89 in mine, plus Lucas oil fuel treatment. 89 is cheaper for me because of the ethanol
Sounds like one needs to figure it out for themselves. If 89 is $.10 more per gallon, I need a 0.5mpg bump to break even on a 25gal fill up.
25gal x .10=$2.50, increase of .05mpg=12.5miles, 12.5miles/14mpg=0.89gal,
0.89gal x $2.79(what I paid yesterday)=$2.48 saved.