revdsid
Kalamazoo
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Joined: 06/24/2005
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9 mpg +/- and that is the answer-- 8.5 to 9.5 -- It's just plain physics: it takes so much energy to move so much mass with the resistance caused by the air against the unit "going up" (an asymptope) with speed. Certainly, being just above the "shift point" on the gears (for me 59 mph)is an attempt to find the most efficient transfer of energy from the engine to the rear wheels. Your "buddy" cannot change the result given the available technologies: somewhere near 9 mpg. To figure out how to be 20% better on average would make him a rich man (because he would know a secret no one else knows).
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rvten
Crossville,TN
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Joined: 11/30/2000
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Just made the trip from Crossville, TN. to Fredericksburg, TX. 1100 moles and 8.5 is the average for this trip. Running 65 most of the time.
Tom & Bonnie
Crossville, TN.
Aspect 29H 2008 Type C
Ford Flex SEL 2010
There is no B+
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timwood
Oxford, Michigan
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One thing I didn't see mentioned in all the posts in this thread is speedometer error. Unfortunately (and most unfortunate for those who "think" their V10 is getting 10 or better MPG), nearly ALL speedo's or odo's (or both) have some error, and some have ALOT of error. My experience shows error is almost always "optomistic", showing you going faster/farther than you actually are.
As an example, when I first got my '03 class C, I made a few trips, checked the the gas mileage by dividing the miles driven (on the odo) by the gas filled since last fill up, and I was seeing 10-11 mpg. Then another time I made a check of my speedo/odo and OOPS, when showing 60 mph, I was only going 57, and for every 100 miles shown, I was only driving 94!!! That makes 10 mpg calculated before error become 9.4 mpg after error.
You can check your speedo with a gps, as most gps are accurate within .6 mph. I also checked my odo with a gps, but that is a bit more complicated, because of the way the gps records mileage. I found my error when I used a gps, a stop watch, and a section of roadway called "the seney stretch" that is about the longest straightest roadway in Michigan.
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Monaco Montclair
Virginia
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All I can say is we have a v-10,from new 15k on the clock, 12.6. Not towing , 10 towing, can say for A fact that I have counted 10plugs, so maybe I do have a v10, hummmmmm, something to think about. Happy--camping
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rvten
Crossville,TN
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Joined: 11/30/2000
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Monaco Montclair wrote:All I can say is we have a v-10,from new 15k on the clock, 12.6. Not towing , 10 towing, can say for A fact that I have counted 10plugs, so maybe I do have a v10, hummmmmm, something to think about. Happy--camping
Must drive about 45 MPH down hill all the time. Even when I drive at 55 MPH I never break 10.
What I see on Scan Guage as actual MPG is not average MPG.
MY Garmin GPS figure's and Scan Guage MPG pretty much match each other.
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ron.dittmer
Northern Illinois
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There is also a big difference between flat interstate highways and modest hill country. Head winds and tail winds are also huge factors. There are so many influences that normal cars are affected only slightly, but a motor home is affected dramatically.
When I read of someone here claiming worse fuel economy, I figure he may have a heavy foot or he lives off the beaten path, and/or in hill country. When I leave home to head out on trips, I am only 3 miles from a relatively flat interstate highway and head farther from the city, so my mpg figures start out with ideal conditions.
I wonder what my fuel economy would be if I left my tow'd vehicle home, then drove only 55mph on flat interstate highways for 3000 miles straight. But that does not represent a real driving application.
2007 Phoenix Cruiser model 2350, with 2006 Jeep Liberty in-tow
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CamperKirk
Bay Village
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No chance in h_ll its getting that type of millage............
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pianotuna
Regina, SK, Canada
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Hi,
On my current trip, driving at 48 mph I got the best mileage I've ever observed--10.66 mpg. The average for the trip is 9.17. Most of the driving has been at 50 mph or lower. Trip is 1/2 over and I've driven 2888 miles, so far.
Regards, Don
Kustom Koach Class C 28'5" 256 watts solar, 875 amp hours in two battery banks 12 volt batteries 2500 watt inverter.
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John & Angela
Full Timers in Canada, USA and Mexico
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Routinely over 10 MPG with the cruise set at 57 MPH when in the US. We have hit 11 through texas. If we set the cruise at 65 we are down to about 8.
This is in a 2001 V10 powered 22 foot class C with the sloped front end (some call them super B's)
2003 Fleetwood Revolution 40C. Smart car CDI diesel TOAD towed on a trailer
2001 22 foot Vanguard VXL 2200 when travelling in Mexico
Retired Canadian Air Force Technicians
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PortAdoug
Texas
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I have a 29 foot V10 Phoenix, Ford 450 and have had several m/h with the Ford V10, am happy with the engine, but can say like most of these posts, over 7 or 8 mph is down hill with a tail wind...not going to do it, never going to do it, will not do it...my toad is a Jeep Liberty, the good thing is the mpg is consistant with towing up or down hill, just figure on 7 or 8, and I would guess you honorable buddy is figuring from gas gauge not filling full tank and dividing by miles driven..
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