My Dodges actual fuel mileage.

[sld]

You should use a handheld gps to verify your speedometer / odometer as a starting point.

Without doing that you will never know what is accurate or not.

 

[B7510HSD]

I have never hand calculated mine. I didn't buy it for mileage. I bought it for the power it has vs gasoline. Mine also shows about the same as yours & mine has 373 gears

:thumbsup: If it says it needs fuel I fill it up to much other stuff to stress over than this!!

 

[dodge man]

I drove a known distance and it seemed to check out. I'm pretty sure my tires are stock sized.

I've owned maybe half a dozen vehicles with trip computer, and the mpg's have always checked pretty good, but not on this truck.

 

[JimRB]

2004 Dam 2500 HO with auto, forget the gears, missing the plastic air deflector under the bumper. Cruise set at 60 (gps confirmed), weather calm and 60-70F, LOM 27.2 and actual 23.4 mpg, 426 mile trip going and coming. Flatlands of I16 heading to Savannah. I am a master of wasting time filling up that tank to the brim. I may get that fill the tank quickly kit sometime soon. LOM is shorthand for Lie O Meter.

For my truck trying to get it up to 50 to get the torque converter locked up can be challenging when driving to and from town.

 

[RoyJackson]

That is true on the smaller tanks. Like my saturn. With only pumping about 8 gallons per fillup, squeezing an extra couple tenths of a gallon does make quite a difference. EX: 300 miles / 8 gallons = 37.5MPG. 300 miles / 8.3 gallons = 36.1 PG

It makes FAR less of a difference on a 30 gallon fillup like my truck.

EX: 500mi/30gal=16.6MPG....500mi/30.3gal=16.5MPG

True, but I don't worry about tenths of a gallon...I always round up or down to the nearest half gallon.

 

[DT86]

On my '97 Cummins all I know is you better start lookin for fuel around 410 miles on the trip odometer as the fuel gauge hasn't worked since around '03 and I'm too fat to walk.:laughing:

 

[dodge man]

I towed with it today, about 180 miles towing my 7k car trailer with a old Ford 2N on it for maybe 4500lbs total. I got 13.5mpg on the trip, not to bad I guess.