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09-14-2022, 02:07 PM #1
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Better Than Expected MPG While Towing Across Country
We just completed a trip from Central California to Yellowstone & Grand Tetons.
When budgeting for fuel I assumed 8.5 to 9.0 MPG as is our usual when towing to our regular haunts (150 to 200 mile trips).
We filled up in Nevada and several times in Idaho & Wyoming during this trip. We started averaging 13.4 mpg.
I was thinking maybe the computer was fouled up but I checked it manually and it was right on.
Is it possible Nevada, Idaho, & Wyoming diesel fuel is better than what we get in CA?
What has been your experience?2020 Reflection 29RS 5th Wheel
2019 GMC 2500 HD 4x4 Duramax
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09-14-2022, 02:21 PM #2
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13.4 according to the lie-o-meter is possible, but actual mileage will be lower. A lot depends on speed, elevation, wind direction. I once got a little over 14 towing downhill with a 30 mph tailwind. That was figured pencil and paper, actual mileage.
Howard and Peggy
2019 Momentum 351M, and 2018 RAM Cummins dually 6-speed.
His: 1999 Honda Interceptor
Hers: 2013 Spyder ST-S
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09-14-2022, 02:29 PM #3
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Hi Howard,
This was a mix of mountain and valley driving and as I mentioned, I was checking it manually and it was pretty close.
This was over the course of 2,000 miles so it was not a computer error.
Interesting huh?2020 Reflection 29RS 5th Wheel
2019 GMC 2500 HD 4x4 Duramax
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09-14-2022, 02:42 PM #4
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Yeah, that's pretty phenomenal. It's rare that the lie-o-meter and actual paper and pencil figures agree. It's never happened to me. It's not computer error, just the way the numbers are figured. Anyway you look at it, higher numbers are better.
Howard and Peggy
2019 Momentum 351M, and 2018 RAM Cummins dually 6-speed.
His: 1999 Honda Interceptor
Hers: 2013 Spyder ST-S
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09-14-2022, 02:59 PM #5
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I notice that above 4000 feet of elevation, I get better MPG with my gasser also. Less air resistance. Above 5000 feet, I can get the same MPG going 70 MPH that I get going 62 MPH at sea level.
Matt, Irene, and Ruby (our Golden Retriever)
2022 Imagine 2600RB with ProPride 3P
2024 Silverado 2500 LTZ Gasser (3500 payload)
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09-15-2022, 09:33 AM #6
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Ok, well that makes sense.
It was also really interesting towing at 72MPH across Nevada, Idaho, & Wyoming and being passed by commercial truckers!
I had never pulled the trailer above 62 MPH until then. IT was a bit un-nerving at first but I got used to it pretty fast.
It was tough to go back to 55MPH (I usually go 62 mph like the trucks) when we got back into CA.
BTW Nevada, Idaho, & Wyoming roads are so smooth compared to the crappy roads here in CA.2020 Reflection 29RS 5th Wheel
2019 GMC 2500 HD 4x4 Duramax
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09-16-2022, 07:51 AM #7
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Jay Leonard
New Port Richey, Fl
2022 Imagine 2600 RB, 2021 Ram 2500 CC Bighorn 6.7L Cummins
New Grand Designer Owner to be
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