I am getting about 16.0 mpg but not pushing the pedal to the floor. (not as much fun). I calculate MPG every fill and the computer is about 0.9mpg high. Last tank computer calculated 17.9 and I calculated 16.97mpg. My 2.7 ecoboost F150 was off by 1.5mpg.
~21mpg after tune.
- Thread starter luv2xlr8
- Start date
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bjork
Full Access Member
Here I am sitting on 11mpg (on a good day). The skeptic in me thinks that I actually get even lower than that, but the lazy jack *** in me will never know for sure. If you’re really getting 21, or near it, I envy you my friend.
CoronaRaptor
FRF Addict
The best I ever got was 20 mpg and that was driving 50mph like a little old lady on the highway and being so gentle with the gas pedal going up any hills and freewheeling as fast as I could down any hills. I do average 17 though driving through the mountains on a 3.5 hr trip to the coast doing the speed limit of 60-70 mph. Get around 9.8 towing my trailer, has never changed since new and doesn’t seem to matter what tires either.
After remembering that I in fact have 2 feet, I did end up driving through the rest of my tank of gas and I came out to 19.8 gallons. So as @GordoJay said, about 1mpg below is what the actual equates to.
It's best to run an average since different pumps will have slightly different cutoff points. I ran six or seven tanks, threw out the highest and the lowest, and averaged the rest.
I just did this and it was off by 1.2mpg. The instructions didn’t work.
You have to hold the ok button then start the truck and when it says test mode release the ok button. I must have done it 5 times the other way before I figured it out. lol
aandrews109
Full Access Member
Running a 93 Octane Tune from JDM Performance. Road trip last weekend, about 1/2 back roads at 65 ish and the other half 4-Lane at 70-75 (not interstate) and got 19.5 on the meter. It's usually with about 3/10s and on the high side. Have gotten as good as 21 running around 60 mph. Running stock BFG's @ 36 psi front / 32 psi rear and Mobile 1 Full Synthetic.
tractorman
Active Member
Just drove my stock 2019 from Northern California to Kalispell, MT, and back. 1950 miles, 18.7 mpg per the meter. I did not hand calculate. Generally running about the speed limit to 5 over. I'm pleased with that.
