2020 Duramax - Very Unscientific MPG Run.
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Joined: Nov 2002
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From: Mansfield, TX USA
2020 Duramax - Very Unscientific MPG Run.
I did a short MPG run in my 2020 Duramax. The truck has 1300 miles on it, so still breaking in.
Conditions were almost ideal. Cool (for TX), 70*. No wind. Ever so slightly rolling terrain. Only me in the truck.
Same road. 10 miles North. Turn around. 10 miles South.
Cruise set at 71 MPH.
Trip computer said 20.5 MPG.
Once again, very short run. No load. Ideal terrain and weather.
Conditions were almost ideal. Cool (for TX), 70*. No wind. Ever so slightly rolling terrain. Only me in the truck.
Same road. 10 miles North. Turn around. 10 miles South.
Cruise set at 71 MPH.
Trip computer said 20.5 MPG.
Once again, very short run. No load. Ideal terrain and weather.
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Ideal conditions, lightly loaded, nearly flat, steady speed. Everything gets good mpg under those conditions.
Fuelly.com shows 51 vehicles with the diesel, 2019 and 2020, logging over 500,000 miles. Both years come in at 14.5 mpg.
The filters are a little hard to manipulate there, but I'm pretty sure all I got were diesels. I did 2500 HD as the main filter.
YMMV
Fuelly.com shows 51 vehicles with the diesel, 2019 and 2020, logging over 500,000 miles. Both years come in at 14.5 mpg.
The filters are a little hard to manipulate there, but I'm pretty sure all I got were diesels. I did 2500 HD as the main filter.
YMMV
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@jschira I just noticed your signature. Usually my eyes glaze over signatures, but I was trying to see what Ford truck you used to have, before switching to your Denali. I guess I'll have to read your post history to learn why you made the change, but in the meantime, that signature! Wow! You have quite an enviable collection of vehicles... each quite different... each for a different purpose... each being a dream car for various someones... and each in your own driveway. I'll bet you never get bored behind a steering wheel.
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From: Maine, Virginia
That's enviable in most truck circles and I've learned with my ecoboost and 3.31's that with the right engine / transmission, the 3.31's are a good way to go.
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Joined: Oct 2006
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From: Texas
My 2018 RAM 3500 dually w/ Aisin trans and 4.10 gears...........55XX miles since last fuel filter change has used 325 gallons of fuel.......right at 17 MPG.
That 55XX miles includes 1200 mi hauling a Jeep on a flatbed from AZ to WY; then empty from WY to ND, then return to AZ empty; then a 400 mile trip pulling my 18000 lb Raptor toy hauler 5er, and just my normal running around rural parts of AZ. So I am happy with it.
That 55XX miles includes 1200 mi hauling a Jeep on a flatbed from AZ to WY; then empty from WY to ND, then return to AZ empty; then a 400 mile trip pulling my 18000 lb Raptor toy hauler 5er, and just my normal running around rural parts of AZ. So I am happy with it.
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