Lying MPG gauge - Ford F150 Diesel Forum
  • 2 Post By kdjasper
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post #1 of 3 (permalink) Old 03-14-2019, 10:33 PM Thread Starter
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Lying MPG gauge

I have almost 1500 miles on the truck now and every time I've filled the tank the truck's MPG meter is 1MPG more optimistic than the actual math of miles/gallons.

Anyone else checked the MPG meter compared to the real calculation to see what you get?
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post #2 of 3 (permalink) Old 03-14-2019, 10:48 PM
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Pretty normal for all vehicles I think. The MPG gauge is always a little high, or low.

2018 Ford F-150 King Ranch 3.0L Power Stroke 4x4 | Icon 2.5 Front & 2.0 Rear, Toyo AT II 295/60R20, 3" ProComp Rear Block, S&B Dry CAI, LineX & BakFlip MX4, BuiltRight Seat Release | ForScan Mods: Disable Double Honk, 2x Panic, DPF Full %, Digital Temps Above Gauges, A.S.S Disabled
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post #3 of 3 (permalink) Old 03-15-2019, 12:16 AM
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Here is how you fix it to get it more precise -->

I was going to wait until I am running on non winter blend diesel (i.e., summer diesel) before I attempt to do this correction.

My truck has always been reporting ~1mpg over hand calculated also, and my odometer is almost at 6,000 miles now.

2018 Ford F-150 King Ranch FX4 3.0L Power Stroke 4x4, Long Bed & Trailer Tow Mirrors | Spray-in & Wheel Well Liners & BAKFlip CS/F1 & BAKFlip BakBox 2
ForScan Mods: DPF Full %, Bambi Mode, Show Temps Above Gauges, Operator Commanded Regen (OCR), more to do...

Traded In* ---> 2010 Ford F-150 King Ranch 5.4L Triton, LINE-X & BAKFlip CS/F1
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