Fuel mileage

Kubotaorange76 · Jun 11, 2018

too small of a quantity and distance and run to be accurate

TacomaJD · Jun 11, 2018

Alright Chad, you have to calculate an entire tank now and post up results. :rolf:

zukimaster · Jun 11, 2018

Yeah, no kidding! I understand fully about a full tank and going the distance, and it will not be that good when stopping and starting, but that was as far as I have driven it at one time, and it only used 3.66 gallons driving easy on the interstate, coming from a 454 dually getting about 9mpg, I was amazed.

slravenel · Jun 12, 2018

my 2014 duramax 2500 crew cab short bed SRW 4x4 stock motor, no deletes or tunes, leveling kit and 275/65R20 (34") tire gets about 13.5 - 14 mpg city driving (decent bit of sitting in traffic), 20ish highway mpg at around 75-80mph (ranges 19-22 depending on headwind and how hilly it is), and towing a standard wood deck 16 foot trailer with my buggy on it (~4000lbs buggy) at about 75mph it gets 12-13 mpg.

No inflated numbers and all hand calculated

Just for numbers sake...

ranger11 · Jun 12, 2018

I hand did mine on my hand and get 48.3764 mpg with this set up. I have to run 2.75 gears with all the horsepower the big C makes. Oh and we run around 85mph unless in cities then it's 78.3.

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onepieceatatime · Jun 12, 2018

Re: Re: Fuel mileage

ranger11 said:
I hand did mine on my hand and get 48.3764 mpg with this set up. I have to run 2.75 gears with all the horsepower the big C makes. Oh and we run around 85mph unless in cities then it's 78.3.

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All that is more believable than the fact that you don't have your tow mirrors turnt up? Or am I just looking at it weird?

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civicmindedex79 · Jun 12, 2018

Re: Re: Fuel mileage

onepieceatatime said:
All that is more believable than the fact that you don't have your tow mirrors turnt up? Or am I just looking at it weird?

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Or have a transmission installed along the way. :rolf:

Kubotaorange76 · Jun 13, 2018

ranger11 said:
I hand did mine on my hand and get 48.3764 mpg with this set up. I have to run 2.75 gears with all the horsepower the big C makes. Oh and we run around 85mph unless in cities then it's 78.3.

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Slow down to 70 and it starts making fuel?

tallnate · Jun 13, 2018

zukimaster said:
Yeah, no kidding! I understand fully about a full tank and going the distance, and it will not be that good when stopping and starting, but that was as far as I have driven it at one time, and it only used 3.66 gallons driving easy on the interstate, coming from a 454 dually getting about 9mpg, I was amazed.

Just a thought but maybe the pump was out of wack and was supplying more fuel than it registered. I stopped at a pilot one time and as soon as i flipped the lever up and turned to put the nozzle in, diesel started running out at a decent stream before I'd ever pulled the trigger. If I'd of had 45 minutes to waste I could have filled up for free.

The best I ever got in my old lbz was about 25mpg and that was from a speed limit cruise down the interstate with as minimal throttle as possible. I have a new 2018 duramax now and 21mpg is the best 50 mile average I've seen in the first 10k miles. It tends to avg around 16.5 on the interstate.