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Old 04-19-2019, 11:44 AM   #1
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Join Date: Apr 2019
Location: BC Canada
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MPG comparison-would appreciate your input

Record high gas prices in BC Canada are prompting me to do a lot of research before i buy a new set-up.
We had a 28' Class C for 6 years. We sold it and now are looking at newer models with a maximum length of about 30'. We are considering the 3 completely different options listed below.

I would appreciate your responses on what your MPG is for the rig you are using if you are in the following categories:

Small Class A max 28-30'. looking a the new Winnebago Intent or similar.

Similar 28-30' Class B+. Some also call them C but I am only looking at the ones without the bunk over the cab (TV and storage instead), they are more streamlined than the regular Class C. If you have owned both and know the difference in MPG it would be very useful to hear your experience.

1/2 ton (if possible GM) pick-up pulling a 26' something similar to a Keystone Premier series trailer (streamlined front end, 6100 lbs dry weight).

We will be spending long periods of time in the RV so we are not considering the small diesel B Class due to smaller space. We will travel long distances. We will be careful to use only light items to load our belongings.

All the options would be in the gas version. Diesel would be a problem for us as the smell makes my wife stomach sick right away.

I know this is frequently approached subject. I would appreciate your cooperation. I am mainly only looking for the fuel consumption numbers you have.

Thank you

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Old 04-19-2019, 11:49 AM   #2
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2001 F53 V10 with 4 speed tranny, gross weight 16k w/toad - - 8.0 mpg
1999 F53 V10 with 4 speed tranny, gross weight 23k w/toad - - 7.0 mpg

1999 Fleetwood Southwind 35S (Ford F53 6.8L V10 275hp 4R100 4 spd trans) - Toad 2003 Saturn Vue.

It won't do MACH 2, but I can get a sandwich and take a pee.
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Old 04-19-2019, 12:51 PM   #3
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My 2008 chassis F53 (5-speed trans) under a 2010 32" Winnebago Vista 32K with a 4-down Mini Cooper Roadster Toad over the past 24K miles is getting 6.84 MPG average. That's a couple trips around the US at mostly around 64mph.
Thom and Diane Boles
2010 Winnebago Vista 32K **2013 Mini Cooper S Roadster ** 2010 Triumph Tiger 1050 at home...
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Old 04-19-2019, 12:54 PM   #4
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Many discussions on fuel mileage. For DPs figure 6 - 8.5 no matter the size.
And, with a DP...you never smell diesel.

Gas RVs are generally smaller so typically you will get more mileage.
36' Gas is around 7-8 mpg ish.

I have never had a B or C class so have no background to share.
2002 Newmar Mountain Aire Limited 4370 w/ Spartan K2 and Cummins 500hp
ASE Master Certified (a long.....time ago...)
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Old 04-19-2019, 04:38 PM   #5
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Too old...

Not that you might care, but... I don't think much has changed in fuel economy over the years. For what its worth...

1976 Dodge 22 ft. Brougham with a 360 and a 727 3-speed automatic. Best ever was 8 or 9 to the gallon. Worst was about 3 to 4 to the gallon.

1993 Winnebago 34 ft. Elante with a 454 and a 4 speed 4L80E automatic. Best ever was 14.7 and generally will avg. about 10.

I have learned three things concerning fuel economy and motorhomes:
1.) Overdrive is nice. I mean REALLY NICE.

2.) Too small of a motor means your always working it hard. Half throttle on my Winnebago is about what the Dodge 360 would do when you had it to the floorboards. Big blocks are nice and that 454 has decent torque.

3.) Go big cubic inch wise and drive moderately. Use rolling hills to your benefit and have a light and steady foot on the accelerator.

I try to plan ahead dollar wise and figure I'm just going to have to bear the pain of a high fuel bill.

Might as well be comfortable then, right?

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Old 04-19-2019, 05:39 PM   #6
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Somewhere around 7 towing or not with my 31 ft Newmar.
Tom Wilds
Blythewood SC
2016 Newmar Bay Star Sport 3004
2015 Jeep Wrangler 2DR 4WD Sahara, Automatic, Hard Top
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Old 04-19-2019, 06:05 PM   #7
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Only the recent small diesel mh's get decent mileage. My 50,000#+ mh towing a CR-V gets me 7.7 mpg And that's a 51,000 mile average. On the flats I see 9 to 10 mpg but the hills suck fuel up.
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft
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RV'ing since 1957, NRA Benefactor Life, towing '14 CR-V
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Old 04-19-2019, 07:06 PM   #8
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If you are looking to get the best fuel economy, whether you are driving a Prius or a 45 foot class A, driving moderately is your best bet. Pushing a huge box through the air at high speed, fast acceleration, and tailgating will all cost you to burn more fuel. When I say moderately, I mean not touching the pedal or the brake any more or harder than necessary. Before DEF, I could usually get 9.5 to 10.5 mpg in a 425 HP diesel pusher while towing. I now have a 380 HP unit with DEF and get between 8.5 and 9.5 BUT, I rarely go over 60 MPH.

On the other hand, if you are driving an expensive RV, what's a few MPG worth to you?
Frank & Corrine Miller - 2011 Discovery 40X
380HP Cummins ISC 8.3L Engine, Freightliner XCM Power Bridge Chassis
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Old 04-20-2019, 03:17 AM   #9
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1/2 ton 6000 lb tow. IMHO need to be 5th wheel..or 3/4 ton better tow vehicle 8-12 mpg gasser.
Nobody mentioned Sprinter based class C RVs if not small.. ..get 16-18 mpg .
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Old 04-20-2019, 09:51 PM   #10
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31' class c, e-450, v-10, 6 speed. I only checked it once and decided to not check it again. 8.7 mpg
2018 Forest River 2851SLE "Forester" E-450 Class C , Sumo Springs bump stops Front & Rear, Hellwig Sway Bars Front & Rear, Bilstein HD shocks front & rear, Roadmaster Steering Stabilizer, alignment set to +5 caster. (that's it, out of $$$)
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Old 04-20-2019, 10:03 PM   #11
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I feel bad for you BC rv'ers. Just wait till Alberta turns off the oil and gas taps. Left vs right...who's gonna win?
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Old 04-21-2019, 10:16 AM   #12
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A half tons MPG towing a 26' RV trailer will vary greatly depending on the speed driven. If kept under 60MPH most will do ok getting between 10-15MPG. Boosted half tons towing faster than that start dumping fuel into the motor as boost comes in and the economy tanks down to 6-9MPG.
1992 Dodge D250, 18cm housing, getrag 5sp, 4" straight pipe
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Old 04-22-2019, 10:44 AM   #13
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Hi ! Welcome to IRV2! We're sure glad you joined the gang!

Have fun and keep her between the ditches!

Good luck, happy trails, and God bless!
Joe & Annette

2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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Old 04-22-2019, 11:04 AM   #14
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Have heard that the MH on the Sprinter chassis make quite good mileage.

IMO buy something that is comfortable and you enjoy being in. Costs are a factor but IMO more people change units because they are not comfortable than cost to run.

Gordon and Janet
Tour 42QD/InTech Stacker
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