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Topic: Gas Mileage: C vs. A

Posted By: campingfig on 07/08/07 11:35am

Winnebago: Outlook Class C, 32 ft and the new Class A 32K Vista, 33ft. They both have the EXACT same Ford Engine. Dealer told me both get the same mileage of 6 mpg. Is this true? I was told the class C get can 10-11 mpg. If the A can carry more stuff, fluids, etc aren't you moving more weight? In a time with high gas prices, every mile counts now. Who knows if an A vs. C similar length, gets same or different mileage?


2007 Winnie Outlook
2007 Honda CRV NAVI/AWD
Blue Ox



Posted By: dleslie125 on 07/08/07 11:46am

Are they both the lower powered 6.8?

His guess on mileage is way off IMO. We got around 9 mpg most of the time with our first A which was on a F53. We just got a new C with an 8.1L Vortec and get just a sliver under 8 mpg not towing (don't know what to expect we we tow our Tahoe). It may do a bit better as on both trips we got backed up for an hour crossing over from Sarnia to Port Huron.

Our two diesels got 8.3 (Cat C7) and 7.6 (ISC 330) towing a Colorado. The ISC got 8.3 towing the Tahoe. The mileage varied very little.


2011 Itasca Impulse 26QP Silver Toad 2014 Jeep Cherokee Limited
New W-I Class C Yahoo Group
07 Jayco 32SS Kodiak 8.1 • 06 HR Amb 40PLQ ISC • 04 Winnie Jrny 39W CAT • 2000 Triple E CDR F53
Member Super C RV Group


Posted By: campingfig on 07/08/07 11:59am

so you got less on your C? I am wanting to compare the same engine though. One is on an A and the same engine is on a C same length.


Posted By: tom_kat on 07/08/07 12:02pm

they would be close in MPG between the two around 7 MPG average would be about right depending where its driven flat or hills ,wind ect.i used to get 8 to 10 with a 24ft class C w/460 ford,and 6 to 7 with the 33ft class A w 454 chevy thats with no flat road driveing all hills and mountains.


1985 Class A Holiday Rambler Imperial 33 +1979 Class C Holiday Rambler Statesman 1000 = 24 ft



Posted By: LandYacht2007 on 07/08/07 01:59pm

I have 2008 27" Itasca Cambria with Ford Motor. With genartor running I get around 8.3mpg without 9.0mpg + or -. This is with water tank 3/4 full and coach fully loaded. I hope this helps.


Posted By: map40 on 07/08/07 02:52pm

Weight is not that much the issue, but air ressistence is. The C has a better aerodinamics (a Brick against a half brick on a Van). Small difference though.


2007 Majestic 28A
Life rocks when your home rolls


Posted By: T18skyguy on 07/08/07 06:07pm

I think a 32 foot C getting 10-11 is a little high. Thats the best I can do and my rig is only a 22 footer.


Retired Anesthetist. Pilot with mechanic/inspection ratings.1996 Jayco C 22 foot with 460/Banks Powerpak/Bilsteins.Wife and daughter. Two cats which control my life. 1975 Ford F-250, 84 Coupe Deville, Thorp T18, tons of tools and tons of junk.


Posted By: DouglasC on 07/09/07 05:28am

In the past 18 years I've had 4 Class A motorhomes and 2 Class C motorhomes. Engines included the Ford 460 CID (3 of them) and currently the Ford V-10. Also had a Chevy 8.1L in a Workhorse chassis and a Cummins 8.3L diesel. In my experience, the fuel economy really didn't vary all that much - from a low of 7.1 MPG in a 35' Class A with the Ford 460 to a high of 8.3 MPG with the Cummins diesel and also from my current Ford V-10 in a 28' Class C. (My figures include pulling a toad about 95% of the time.)

I've heard people claim that they get 10-11 MPG with small Class Cs and some small diesels but I doubt that they average those kinds of numbers overall. Everyone gets lucky once in a while and puts on a few hundred miles traveling east with a westerly wind at their back. But averaging 10-11 MPG overall - I serious doubt it!!


Doug
2006 Jayco Greyhawk Model 27DS
Towing 2012 Ford Fusion Hybrid with Brake Buddy



Posted By: dleslie125 on 07/09/07 08:26am

DouglasCraw wrote:

In the past 18 years I've had 4 Class A motorhomes and 2 Class C motorhomes. Engines included the Ford 460 CID (3 of them) and currently the Ford V-10. Also had a Chevy 8.1L in a Workhorse chassis and a Cummins 8.3L diesel. In my experience, the fuel economy really didn't vary all that much - from a low of 7.1 MPG in a 35' Class A with the Ford 460 to a high of 8.3 MPG with the Cummins diesel and also from my current Ford V-10 in a 28' Class C. (My figures include pulling a toad about 95% of the time.)

I've heard people claim that they get 10-11 MPG with small Class Cs and some small diesels but I doubt that they average those kinds of numbers overall. Everyone gets lucky once in a while and puts on a few hundred miles traveling east with a westerly wind at their back. But averaging 10-11 MPG overall - I serious doubt it!!



I'm with you all the way which is why I only look at full tanks - and not just one of them but several in a row.


Posted By: Ronnie Trower on 07/09/07 10:26am

31' C, with V-10 I just completed a round trip from Central Texas to West of St. L, MO. I was full loaded and got between 7.1 to 7.7. I checked every tank both ways. Hills and wind caused the variance in my opinion. I also thought I was getting around 10 before I really took a trip.


Posted By: klhutch on 07/09/07 11:36am

campingfig wrote:

I was told the class C get can 10-11 mpg.


Some can, some do better than that. Our 23 foot BT Cruiser gets about 10.5, many tankfuls, when driven 60-65 over the fairly flat terrain of Illinois and Wisconsin. Compared to the one you intend to buy it is lighter, shorter (lengthwise), narrower, shorter (heightwise), and more aerodynamic. All of those combine to give relatively good mileage. If you want to go a little smaller yet at some cost in aerodynamics you can get a Diesel powered View and get 16 mpg according to their owners.

If you want/need a bigger unit you will pay for it at the pump too. The largest traditional class Cs are comparable in size and weight to small class As. There is little reason to expect the mileage to be drastically different from one to the other.

Ken


Posted By: Hook&Go on 07/09/07 11:01pm

Just finished a trip to Little Rock, approx 1200 miles round trip and adveraged between 7.7 and 8.3 in my Winnebago 32' Outlook. Speed between 60 and 70, got to learn to slow down, but I like the Winnebago better due to the fit and finish. We looked at the entry level Class A's also, but the Winnebago just seemed to be made a little better. JMHO Plus, I love the way it handles......


Joe & Debbie Speer
USAF Retired
2006 Winnebago Outlook WF332G
2001 Chevrolet Tracker (TOAD)



Posted By: hstew on 07/10/07 01:02pm

I"m camped out in the parking lot of the Horizon Hotel in Lake Tahoe. Arrived here yesterday driving from Reno. For those of you that have traveled that route you are aware of the extreme climb and hilly conditions in that area. I checked my Scan Gauge ll today in light of this post and discovered I averaged 8.8 on the previous days trip through the mountains. Not bad. The overall tank mileage was 10.6 mpg. Again not bad. Since I fulltime my travel weight is about 12000 lbs fully loaded. ( The max rpm was 3658 the max water temp was 245.)

Hank


2007 Four Winds 5000 26 ft (Chevy Chassis)

Hank
Buster (Pug)

"I give thanks for all the blessings I have received."


Posted By: mbjorge on 07/10/07 11:14pm

Our C (12,500 GVWR) gets about 10 mpg and our A (18K GVWR) gets about 8 mpg. I normally drive 60 mph on the freeway which ever MH we are using. Both MHs have the 8.1 Liter vortec engine. Both have a 4-speed hydramatic transmission (C with the 4L80E and the A with the 4L85E). We've driven the C to Yosemite, Grand Canyon, and different CG within 3 to 5 hours from home. We used the A on our trip to Yellowstone then the Oregon coast last summer. Freeways, state highways, local roads, mountain passes, farm roads, we've driven them all (no dirt roads). The C has about 22K miles in it and the A about 9K miles.

Relax, drive safely, and enjoy God's creations.


4 Kids and Us
2006 Sightseer 33T, W18
2002 Minnie 22E, 8.1L Vortec


Posted By: 1rickw on 08/23/07 07:45pm

I probably average 7.5-8.5 overall. Did get 6.?? recently, but had run the generator for a hour or so with the air conditioner on. Have gotten as high as 9 on some trips, not hills. 26ft Class C...plenty loaded.


2004 Jamboree 26Q + great wife to travel with


Posted By: ahastings on 08/18/07 10:38am

I had a 29' class C with a Ford 460 previously and I averaged 7.5-8mpg pulling a 4000-5000lb trailer, I now have a 33' Class A same motor and same trailer and average 6-6.5 mpg. This concurs with the above poster. If you look at the class A and class C of around the same size the class A will weigh about 2000 lbs more which is significant and they are taller and wider with a flatter front end which also makes a difference.


97 Four Winds Hurricane 33' Class A 460 gas HOG replaced by
99 Allegro Bus 35' Cummins 275 hp, 6 spd Allison,Freightliner


Posted By: map40 on 08/18/07 10:56am

I just returned from my second trip. On the first I got 9 MPG, driving 55. On the second, 7 MPG, driving 70-75. Same as my old Class A.


Posted By: jojolou on 08/18/07 11:28am

The biggest factor in m.p.g. is YOUR foot! Driving between 55 & 60 will give much better results than driving 65 to 70. After more than 13000 miles and most of them pulling our toad, the best we ever got with our 2005 31' Minnie was 10.2 and the worst was 5.4, between 7.5 and 8 m.p.g. is about the average for us.

Lou


Lou
2008 Allegro Bay 35 TSB W-25.5


Posted By: CISCO8325 on 08/18/07 11:34am

my opinon is they both aren't great for gas mileage,if your looking for that. but if they are bigger it's more wind resistance you have on it the less gas mileage you get. simple and easy thought.I can't worry about which one is better I just want to have fun.I save and plan a trip ..LOL


Posted By: jml on 08/18/07 07:03pm

Check the differential ratio. Class A have usualy higher ratio to handle more weight, hence lower MPG.


Posted By: younchem on 08/19/07 02:11pm

We completed a 5300 mile round trip from South Louisiana to Canada (Waterton ) via Yellowstone, Glacier and Black Hills and averaged 8.63 mpg. We had a high of 10.5 mpg and a low of 7.7--terrain and wind affecting greatly.

32' E-450 w/V-10.


Posted By: younchem on 08/19/07 02:16pm

jojolou wrote:

The biggest factor in m.p.g. is YOUR foot! Driving between 55 & 60 will give much better results than driving 65 to 70. After more than 13000 miles and most of them pulling our toad, the best we ever got with our 2005 31' Minnie was 10.2 and the worst was 5.4, between 7.5 and 8 m.p.g. is about the average for us.

Lou


This is right on in my opinnion. The foot is the culprit!

I do 55-60, max.


Posted By: tps0424 on 08/22/07 01:18pm

I just went roundtrip from RI to SC (about 2100 miles). I got a high of 9.3 and a low of 8.1. I kept it as close to 60 as I could. I think that makes a huge difference. Also, the class A's all have the newwer 3 valve V10 whereas the class C's have the older 2 valve v10. I believe that both the A's and the C's have the new 5 speed torqueshift transmission which also helps improve the mileage from the older 4 speeds.


Warren, RI
2005 National Sea Breeze 1341



Posted By: jcamp123 on 08/22/07 01:37pm

I have a 27 foot Coachman Class C with a scan gauge which I use to get my exact mileage every trip. It averages between 7 and 7.5 mpg. This is towing my VW at between 55 to 65 mph or not towing at the same speed. I doubt very much that anybody gets 10 mpg with a class C. If they do they are not figuring their mileage right. I don't care if they are driving on flat ground at 50 mph I think it is impossible. The problem with Class C MH's is sometimes you get the tank full but most times you don't so unless your using some kind of digital meter it's impossible to compute the mileage. The main problem is everybody wants to get 10 mpg so that is what they say they are getting.


Joe and Susan
Tara the toy poodle and Patches the cat
Retired Teamster traveling when I can
2006 Allegro 32 BA
2009 Saturn Vue Red Line
FMCA 50826
-----------------------------------
He who dies with the most toys wins !!



Posted By: hstew on 08/23/07 04:07pm

Also have Scan Gage II, averaging over 10mpg.

Hank


Posted By: apr67 on 08/23/07 06:10pm

jcamp123 wrote:

I have a 27 foot Coachman Class C with a scan gauge which I use to get my exact mileage every trip. It averages between 7 and 7.5 mpg. This is towing my VW at between 55 to 65 mph or not towing at the same speed. I doubt very much that anybody gets 10 mpg with a class C.


And how can you vouch for the accuracy of the scan gauge?

I'm pretty sure I know that I get about 10mpg on my RV. Very consistant numbers over many tanks of fuel.


Don't take your organs to heaven. Heaven knows we need them here.
----------------
2012 Nissan Titan
2013 Keystone Bullet 294BHS

Gone-2007 National SurfSide 34DE
Gone-2006 ForestRiver Sunseeker 2900LTD
Gone-1994 Fleetwood PaceArrow
Gone-1978 Kit RoadRanger


Posted By: ASA Glamis on 08/23/07 06:28pm

I too have a Scanguage but I calculate my mileage using my mileage and gallons of fuel purchased. On a 3541 mile trip through the western states both flat and mountainous driving I averaged 10.38 MPG. This was not towing anything.

I find the Scangauge pretty accurate but will vary a little depending on generator usage. The above figures include a few hours of generator use.

When towing my 24 foot enclosed car trailer I averaged about 9.5 MPG.


2007 Jayco Seneca 35GS


Posted By: ahastings on 08/23/07 07:36pm

ASA Glamis wrote:

I too have a Scanguage but I calculate my mileage using my mileage and gallons of fuel purchased. On a 3541 mile trip through the western states both flat and mountainous driving I averaged 10.38 MPG. This was not towing anything.

I find the Scangauge pretty accurate but will vary a little depending on generator usage. The above figures include a few hours of generator use.

When towing my 24 foot enclosed car trailer I averaged about 9.5 MPG.

Looking at your sig. you have a Kodiak chassis which is much heavier and biggger than a typical Class C. You must have a diesel with those mpg numbers especially pulling a trailer that size with a car in it.I can't believe a gas engine would get that on a rig that size unless you only drive 45 mph on the hwy. I can see some of the smaller class Cs and B+ rvs without towing getting around 10, but not when you get into a 31 or 32 footer with slides like the OP was talking about.


Posted By: SKIRMISH on 08/19/07 12:21pm

We used a 26' Coachmen Freelander for a week, 65-70 mph and used the generator for a couple of hours while camping and got 12. something. It was mostly flat with some slight hills.


Posted By: rvten on 08/19/07 01:12pm

I would double check the Ford engine in the class A and C. My E-450 has the V-10 305 HP. Most class A's I have looked at. Had the V-10 360 HP. So far we are getting better than 10 MPG running the back roads here with a little interstate thrown in.


Tom & Bonnie
Crossville, TN.
Aspect 29H 2008 Type C
Ford Flex SEL 2010
There is NO B+



Posted By: Major Domo on 08/23/07 08:06pm

I have a Gulf Stream Super C, with the 8.1 Vortec Engine. I barely obtain 6 MPG towing a Saturn Ion. Years ago, I had a 36 ft Class A with the Ford 460 engine and was getting between 8-10 MPG towing a heavier car.


Posted By: melmar on 08/23/07 08:49pm

I just returned from a 3300 mile trip and I checked the mileage on every tank. I pulled a 3400 lb toad thru the mountains and back from Fort Worth to Oceanside,CA via Pueblo, CO, Montrose, Co, Las Vegas and then some. This was a real test on the Minnie. The worst I got was 6.9 and the best was 8.9. I haven't figured the total as yet but I suspect the whole trip to be about 7.5 to 8.0. The toad did not seem to matter that much but speed really makes a difference. For example, if I tried to keep my RPM at or near 2200, my mileage was the best. If I traveled at great distances at or above 2500 RPM the mileage suffered. Of course I did go over many mountains that required really high RPM and low gears.


2004 Minnie 31C
2007 Honda CR-V Toad
2005 Nissan 350Z Toy
2 Mini Schnauzers, Ernie and Misty


Posted By: apr67 on 08/24/07 07:00am

Melmar, checking tank to tank is good, but do it for the whole trip to get a more accurate figure. Here is what I do:

1. Fill up at a specific pump at a specific gas station.
2. Write down the Gennie hours and mileage.
3. At every fillup write down the cost per gallon, gallons, gennie hours and mileage.
4. When I get home I go to the same gas staion and exact same pump, fill up and write down the cost per gallon, gallons, gennie hours and mileage.


I throw it in a quick spreadsheet, and figure the gas mileage for every fill up and for the whole trip. I do it will three fuel figures for the gennie, 1/3 gallon per hour (no load), 1/2 per hour (1/2 load), and 3/4 gallon per hour (full load). When people ask my mileage I generally give the mileage for the entire trip and consider the gennie at 1/2 load. When I fuel I also determine if any alcohol is in the fuel and note it, so that if I get a lower MPG for a segment I have an idea if it was fuel related.

I'm happy to report that I get between 9.5 and 10.5mpg towing with my 29' 2007 Sunseeker LTD Class C. Its is Chevy 6L powered. I set the the cruise between 62 and 65 on the highway.


Posted By: map40 on 08/24/07 12:16pm

apr67 wrote:

Melmar, checking tank to tank is good, but do it for the whole trip to get a more accurate figure. Here is what I do:

1. Fill up at a specific pump at a specific gas station.
2. Write down the Gennie hours and mileage.
3. At every fillup write down the cost per gallon, gallons, gennie hours and mileage.
4. When I get home I go to the same gas staion and exact same pump, fill up and write down the cost per gallon, gallons, gennie hours and mileage.


I throw it in a quick spreadsheet, and figure the gas mileage for every fill up and for the whole trip. I do it will three fuel figures for the gennie, 1/3 gallon per hour (no load), 1/2 per hour (1/2 load), and 3/4 gallon per hour (full load). When people ask my mileage I generally give the mileage for the entire trip and consider the gennie at 1/2 load. When I fuel I also determine if any alcohol is in the fuel and note it, so that if I get a lower MPG for a segment I have an idea if it was fuel related.

I'm happy to report that I get between 9.5 and 10.5mpg towing with my 29' 2007 Sunseeker LTD Class C. Its is Chevy 6L powered. I set the the cruise between 62 and 65 on the highway.


Yeap, the 6.0L chevy will give you 1.5 to 2 MPG more than the Ford.


Posted By: SKIRMISH on 08/24/07 02:25pm

mbjorge wrote:

Our C (12,500 GVWR) gets about 10 mpg and our A (18K GVWR) gets about 8 mpg. I normally drive 60 mph on the freeway which ever MH we are using. Both MHs have the 8.1 Liter vortec engine. Both have a 4-speed hydramatic transmission (C with the 4L80E and the A with the 4L85E). We've driven the C to Yosemite, Grand Canyon, and different CG within 3 to 5 hours from home. We used the A on our trip to Yellowstone then the Oregon coast last summer. Freeways, state highways, local roads, mountain passes, farm roads, we've driven them all (no dirt roads). The C has about 22K miles in it and the A about 9K miles.

Relax, drive safely, and enjoy God's creations.



Cool! Combined, that's 18mpg!!!


Posted By: rvten on 08/24/07 02:28pm

Wife and I must not be good at math. We got 10 mpg one fill up and 14 mpg on another. No toad this trip


Posted By: Coffeebean51 on 08/24/07 08:42pm

I just returned from a wild trip from CA to MD, to SC - NC and back to CA., mileage with my 31 ft 2006 Jamboree was 6.5 to 7.5. Mostly around 7. I also found I did alot better by NOT using the cruise control. Learning something new everytime I go out.


Posted By: t&b on 08/25/07 06:44am

I have found that unless you fill to the same level in the neck you will not know the true mpg, every other method is just an estimate. And in hot climates you must add enough fuel to cool any heated fuel in the tank. Yes I know that in some instances the see fill method -could- cause problems.

For the past seven years I have check consumption this way with not a single problem, all diesel vehicles and our sole gassers; Audi and now Subaru. Typically you will see about a 1.5 - 2 mpg increase.

Don't want to start a spirited discussion but if you need to be accurate there is only one way plus you can check virtually any distance, you do not need to consume entire tanks to be dead accurate.


Posted By: campingfig on 08/25/07 09:56am

I just returned from a trip...Southern California to Sydney Australia with my 31H Outlook. I got great mileage until I got to the coast. Heading over the ocean was killer on my mileage...I kept flooding the engine..but I got there! I figure about 6.678945 mpg.




Posted By: dleslie125 on 08/28/07 09:27pm

Got my Scan Gauge this past weekend. The only negative is that the screen is hard to see - just like the info center we had on our Journey.

As to accuracy - well, I tested the speedo with the GPS and it was right on. Since all of the data comes from the engine manufacturer's system, it is as accurate as the info fed to the OBD connector - which is also the source of all the info on the typical trip computer in many vehicles.

The average fuel consumption appears to tie in with our manual calculatlions but I'll know better when we fill up again a month from now. We've had 4 fills since we got the MH - all at the same station - and the 5th one should be there as well - and the same pump. We fill until auto shut off.

Sure looks to be worth the $170. Wish I'd had it for our Ambassador and Journey. I'm thinking of adding one to DW's Equinox.


Posted By: Arnold Wagaman on 08/30/07 12:47am

AS I said in other posts. From Coolidge AZ to Kenai, Alaska I got 7.7 mpg. My speed was 55 to 65 mph I was loaded to the max and pulled a 07 Ford Focus. My rig is a Minnie 32G and I love it. In 2000 we had a 30ft Lazy Daze and went from west coast to east coast then on to Alaska at 55 mph and got 9.5 mpg. Remember the Lazy Daze is 9' from road to top of roof and no slide. Also I did not tow a car.


32G MINNIE, TOW 2007 FORD FOCUS
Heaven!, My last stop.


Posted By: woming on 08/30/07 02:34am

I'm somewhat confused:
what engines are you "talking" about?
Mostly gas engines?

There is a fundamental difference in efficiency
between Diesels and gas engines (about 15% at same power).

Probably based on a construction difference of engines:
my FORD 350 Turbo diesel 24'C
(european engine, twin wheels at rear) goes about 20 mpg at av 60 mph.
Never been worse than 17 mpg.


Posted By: 4gone on 08/30/07 06:49am

I don't know what year coaches you were looking at. I believe that currently Ford chassis class C's have a 305hp V10. Ford Class A chassis is the 362hp V10. So if you are comparing A's and C's, They are not to my understanding the "exact same engine".

My 2006 Jayco Granite ridge 31ss with toad. 6.5 to 7 mpg (06 chassis)
My 2007 Damon Daybreak 3276 35' same toad. 7.5 to 8mpg (06 chassis)

I get much better power, performance, handling, and mpg with the class A.


2007 Damon Daybreak 3276
2010 Suzuki Grand Vitara
Even Brake
Firestone air bags
Blue Ox Alladin tow bar
Hankook Tires



Posted By: AliCat on 08/30/07 08:36am

We had a 2004 Minnie 31C with the Ford V-10 and towed the same Mazda pickup we now tow with our 33' Class A. The difference is about .25 mpg. We averaged about 7.50 with the Class C and get about 7.25 with the Class A. I am not a fast driver so these mileages are about as good as it is going to get for me. The toad affected mileage on the Class C by about .25 MPG. Haven't used the Class A wothout the towed so I don't know how it affects that but I suppose by a similar amount. Biggest factor I believe is how fast you drive. Keeping it at 62 MPH or less helps.


Art
2005 Winnebago Voyage 33V (Workhorse)
Garmin 3760T GPS
2008 Honda CR-V EX-L
Blue Ox Aventa II, Apollo Brake
Protect-A-Tow



Posted By: ron.dittmer on 08/30/07 09:17am

I get the best of everyone here.....averaging 18.6 mpg, last calculated a few years back, over-all on a 2 week vacation from Chicago to the Rockies, covering 4000+ miles. It averaged 20.2 mpg across the open plains in both directions. Speed limited to 60 mph.

Well I used to get that milage when I owned this for 23 years.
See It Here

Today we own a 2007 Ford E350 with 6.8L-V10 at 23.5 feet in length. Our first big trip starts this Saturday, going for 3 weeks from Chicago to San Fransisco, and zig-zagging in between, all while towing our 2100 pound Toyota MR2. Gas mileage will be tracked the same way.....over-all, and across plains. Not calculated by the tank full, but averaging.

* This post was last edited 08/30/07 09:49am by ron.dittmer *


2007 Phoenix Cruiser model 2350, with 2006 Jeep Liberty in-tow



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