Best mileage so far

[AzScorpion]

This is my highway mpg with ford performance tune on 265/70/17 ko2s

Curious was that for a full tank or just a partial tank? If that's after a full tank that's pretty darn good. I once filled up in Flagstaff and took the back roads down Oak Creek Canyon to Sedona which is a very nice drive and all downhill. At the bottom my mpg was around 38 but quickly went down from there. lol

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[GhostStrykre]

all y'all drivin downhill or somethin??! holy moly, i get like 21.5mpg lol.

i'm about to go find the biggest hill in ohio, drive downhill and snap the mpg to post here so i can be the winner lol. hopefully that's funny to anyone familiar with ohio's "hills."