Because iam suprised i getting this good of mileage..

last week, 37 dollars tank is full, i change the mileage thingy to ZERO... today, 347 on mileage thingy, i put 12.2 gallons of gas into my car...

so 347 divided by 12.2 = 28.4

am i doing this right? that seems pretty damn good for a 99 2.5 mtx with 118k on it without a tuneup yet..?

1999 T-Red Contour SE Sport S&B Filter Custom 2.25 exhaust with magnaflow parts. Focus 16" Rims