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Old 10-16-2014, 03:18 PM   #1
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Location: Cary, NC
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Actual Mileage for Western Trip

I thought I would share with you my actual mpg for my western trip in my Fleetwood Montera 25K E450 V-10

We left Raleigh, NC and travelled to Mt Rushmore, Yellowstone, Grand Teton, Bryce Canyon, Zion, Grand Canyon North and South Rims, Monument Valley, Canyon de Chelle, Albaquerque, Santa Fe and then eastward on I 40 to pigeon Forge and then home.

We were gone from Labor Day to October 13 and travelled 6,264 miles and we purchased 702.2 gal of regular fuel for overall mpg of 8.92. We were not towing anything.

During this trip we used the generator a good bit at Yellowstone, Grand Teton and the North rim as well as Canyon de Chelle in addition to lunch stops. I was surprised that a lot of the regular gas was 85 or 86 octane rather than 87 octane we have here in NC.

The majority of the trip was at 60-62 mph and the tach showed about 22-2300 rpm except for I 90 and I 15. 90 is 75 mph and 15 from Sault Lake is 80! The fastest I went on these highways was 70.

My starting mileage was 3800 mi so the engine was not really broken in and now I am over 10k and think the flat country mileage with neutral wind and not towing is 9.2 to nearly 10. I did not have the wind at my back at any time so I did not benefit from it.

I guess this mileage is the norm?

I wish the Ford cruise control fed more gas rather than allowing the down shift but I guess that is the nature of the beast.

Tow haul was a great friend on the mountainous roads and I used cruise sparingly. If I was using cruise I gave it a little acceleration on the hills (up to 2500 rpm) and allowed it to lug down to 2000 rpm to avoid the downshifts

Shirley, Steve & Myers (Choc lab)
Cary, NC
2014 Tioga Montera 25K Ford Super Duty 450 V 10 Acme Tow Dolly & Volkswagen EOS
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Old 10-17-2014, 10:12 PM   #2
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I would be thrilled with that mileage . My Gulfstream 32 foot on E450 with same engine is consistent at 8.1.

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Old 10-17-2014, 10:20 PM   #3
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The reason for the lower octane is because of the elevation, you don't need the higher octane due to the lower air pressure.
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft
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Old 10-18-2014, 12:04 AM   #4
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I averaged about the same on my trip from WA to OH and back this spring w a 29' Four Winds 2006 w the Ford V10 we had as low as 7.2 and as good as 10.1 mpg depending on headwinds, climbing grades and if I kept it to 60 or pushed it to 70-75.

I ran the generator a majority of the time traveling for the AC to keep my dogs comfortable.
[SIGPIC][/SIGPIC]TheDogNPonyShow - Bellingham WA USA
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Old 10-18-2014, 06:57 AM   #5
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That sounds like pretty good mileage. To get a better picture, deduct the generator hour use at 1/2 gallon for each hour. It's only an estimate, but gets you closer to a more accurate number; which in your case will result in better mileage.

Originally Posted by seb1899 View Post
...I wish the Ford cruise control fed more gas rather than allowing the down shift but I guess that is the nature of the beast....
There may be some cruise controls with fine tuning adjustments, but my understanding is when the cruise control sees the speed coming down, it adds gas to regain the lost speed, and if the speed drop is sufficient, gives full throttle and a downshift. Does the Ford cruise have a "Pause" function?. On my GM chassis, when I see the scangauge mileage go under 7 MPG, I jog the pause button on the end of the turn signal lever, speed slows slightly and the transmission stays in overdrive. Of course, when you continue to pause, the speed slows, and eventually a downshift is needed if climbing a grade. However, my technique keeps the transmission in overdrive for most slight grades, and I just jog increase to resume previous speed. I don't have any comparative mileage figures but, intuitively, the more you stay in a higher gear, the lower the engine speed and therefore better mileage. This may seem like too much manipulation, but my wife says it gives me something to do when driving along the interstate highways.
George Schweikle Lexington, KY
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Old 10-18-2014, 09:07 AM   #6
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Wink Real world mileage

Good report from the real world, thanks. On our 22 state, 2 month(May thru June), 7,360 mile cross country jaunt our 24' C E-350 V-10 averaged 9.5 for the entire trip (having the 4:10 rear end and being somewhat lighter probably accounts for the difference between our rigs). I cruise at 55-62 depending on the road, traffic and weather conditions.

This includes some generator run time, lots of dirt roads, city traffic, wind on the nose etc.. To average 9.5 you have to spend a lot of time getting 10.5+ and we do.

2012 Nexus Phantom 23P Class C
Ford E-350 Chassis 6.8L V-10 w/5 speed trans w/tow haul mode, 55 gal fuel tank
USCG Licensed Master 100 Ton (Retired)
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Old 10-19-2014, 06:57 PM   #7
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Hello Seb1899: We have traveled many times (8+) on different units from Atlanta area to Los Angeles round-robin, and now twice on our recently purchased 23' E450 chassis Coach House Platinum. Same milage here both times! Return trip we traveled Hwy 50 (Loneliest Road in America, look it up!) and saw 10+ mpg. My Cruise control has same action here... so, I disengage it during hills by gaining speed on downside and letting off pedal on upside (improves mpg? yes, but not significantly). Does your E450 have sway on fast roads? Ours did, but adjusted camber, installed a steering kit, and have rear air-suspension now! I can drive all day without being tired! I believe the E450 now the BEST unit I've ever owned! You will too!

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