Rich1982
Well-known member
well that 100% stock was Platinum FX4 (extra weight, larger tires/wheels and I suspect you "may" have been using gas with higher ethanol %) - also in the owners manual it states you will get lower than anticipated MPG during break-in period (that does not explain it continuing to decrease though)I have a Platinum FX4. Not sure on tire pressure? I’ll look. I guess my main complaint is when the truck was 100% stock it was getting 21 mpg with Powerboost. I did get 23 mpg once going slow in right lane. My mpg keeps dropping. I’m at 17.0 as of this morning
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