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08-03-2022, 05:06 PM
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#21
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Established Member
Join Date: Aug 2022
Location: WAYNESVILLE
Posts: 10
M.O.C. #31428
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You are right, the computers are a little high, we have a 2016 Ram 3500 and towing we get around 11mpg if I stay under 65 on flat ground.
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Jim & Cindy
2021 Montana 3121 RL
2016 Ram 3500 6.7 SRW
Anderson Ultimate Hitch
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10-17-2022, 11:36 AM
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#22
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Montana Master
Join Date: Mar 2015
Location: Gardnerville
Posts: 1,221
M.O.C. #17163
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IT"S NOT CALLED THE "LYE O METER" FOR NOTHING>. the only true way is to fill up the tank and take them miles and divide by gallons.. usually off by 3 mpg at least..
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10-17-2022, 01:28 PM
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#23
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Montana Master
Join Date: Oct 2004
Location: Salem
Posts: 7,081
M.O.C. #2283
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Quote:
Originally Posted by dfb
IT"S NOT CALLED THE "LYE O METER" FOR NOTHING>. the only true way is to fill up the tank and take them miles and divide by gallons.. usually off by 3 mpg at least..
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On my F150 2.7 the lie o meter is off by about 5%. Lifetime by the LOM is showing 23.2 that should be 21.5 to 22 MPG.
Lynwood
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10-18-2022, 05:15 PM
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#24
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Montana Master
Join Date: Apr 2006
Location: Mesa az
Posts: 2,641
M.O.C. #5651
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I think I am off about 3%. But the calculator is actually pretty close - you see my truck adds the miles driven and is also off about 3%. On a test strip on the highway there was a 10 mile stretch. I think my odometer read 10.2 or 3.
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Tom and Gail
2013 Mountaineer 362
2012 Silverado 2500
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10-18-2022, 06:11 PM
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#25
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Montana Master
Join Date: Jan 2022
Location: Shingle Springs
Posts: 1,149
M.O.C. #30417
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Crap now you got me wondering. I'm getting 10mpg and if its 3% off 7mpg?  I'm going to have to do some checking. I would hope that my 2020 is more accurate...sometimes ignorance is bliss.... 
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Tony & Donna
2022 Montana High Country 295RL, Solar Flex 400, Onan 3600 LPG, 2000 Dimensions inverter
2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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10-18-2022, 06:34 PM
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#26
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Montana Master
Join Date: Oct 2004
Location: Salem
Posts: 7,081
M.O.C. #2283
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Quote:
Originally Posted by Foldbak
Crap now you got me wondering. I'm getting 10mpg and if its 3% off 7mpg? I'm going to have to do some checking. I would hope that my 2020 is more accurate...sometimes ignorance is bliss.... |
No it’s actually 9.7 MPG. 7 would be 30%.
9.7 is in the error range in other words closer than you can calculate on a short 1000 mile trip.
To find your real mileage you haft to do some math or use the web site Fuley over a long time and many fill ups.
Lynwood
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10-18-2022, 06:52 PM
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#27
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Montana Master
Join Date: Jan 2022
Location: Shingle Springs
Posts: 1,149
M.O.C. #30417
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Quote:
Originally Posted by mlh
No it’s actually 9.7 MPG. 7 would be 30%.
9.7 is in the error range in other words closer than you can calculate on a short 1000 mile trip.
To find your real mileage you haft to do some math or use the web site Fuley over a long time and many fill ups.
Lynwood
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Wow it's been a long day.... 
__________________
Tony & Donna
2022 Montana High Country 295RL, Solar Flex 400, Onan 3600 LPG, 2000 Dimensions inverter
2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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10-18-2022, 08:11 PM
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#28
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Site Team
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 6,615
M.O.C. #4831
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I believe the Ford lie-o-meter does not account for the fuel used for DPF regeneration. It always says it used less fuel than the pump dispenses. And the hand calculated mileage is consequently less than what the lie-o-meter displays.
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Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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10-19-2022, 08:45 AM
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#29
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Montana Master
Join Date: Jan 2022
Location: Shingle Springs
Posts: 1,149
M.O.C. #30417
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I guess I'll have to stop relying on tech and do it the old fashion way. And Carl like your signature says, there's more to life then fuel mileage! 
__________________
Tony & Donna
2022 Montana High Country 295RL, Solar Flex 400, Onan 3600 LPG, 2000 Dimensions inverter
2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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