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Old 07-12-2015, 04:19 PM   #1
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Looking for some Real world MPG

Looking for some real world MPG for any class C with Cummins 6.7? Thanks

2015 Thor Challenger 37KT
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Old 07-12-2015, 08:32 PM   #2
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We have the cummins in our Dynamax, got 9.1 on a trip this week towing a jeep.

2016 Dynamax Force, Just Rite 2

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Old 07-12-2015, 09:56 PM   #3
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Lucky you!! Our '85 Class C, a 26-footer with a carburated Ford 460, got about 6 mpg at sea level and less than 5 mpg at altitude, something we have a lot of in this part of the world. Our later '02 Georgetown 32' rig with a V-10 got about 7.5 mpg and it wasn't altitude dependent, thanks to EFI.
Frank Damp -Anacortes, WA,(DW- Eileen)
ex-pat Brits (1968) and ex-RVers.
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Old 07-13-2015, 01:48 AM   #4
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I have a gas powered 1991 22' classnC on a Chevy chassis. 350 fuel injected with four speed overdrive. I average right around 11 mpg but I don't like to go over 65 so I think that helps.

Sorry it doesn't apply to the Cummins 6.7 but I think that engine is pretty rare on class c motorhomes.
Bill Lynch
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Old 07-13-2015, 06:58 AM   #5
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Originally Posted by frankdamp View Post
Lucky you!!

I'm pretty sure that if you do the math you'll see that the cost to get that engine, and it's higher mileage, FAR exceeds any fuel savings.
Ted 'n' Laurie, plus Jackson (aka Deputy Dog, the Parson Russell Terrier 'fur kid') and, Rylie (who crossed the Rainbow Bridge June 14, 2012).
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Old 07-17-2015, 07:05 AM   #6
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I have a 2010 Fleetwood Pulse 24D. I check my mileage all the time and it runs between 13 and 15 when traveling in non-mountainous terrain. Just started towing a Mazda Miata and it looks like it will reduce the mileage to around 11-12. Just got a Garmin RV 760 LMT coupled with the OBD bluetooth and it appears to give me all that information without the math....

Don Coleman Jr.
2010 Fleetwood Pulse 24D
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Old 07-18-2015, 06:33 AM   #7
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2014 Citation avg 9 mpg

2014 Thor Chateau Citation 29TB
2012 Honda Fit
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