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Old 11-21-2011, 01:30 PM   #43
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2008, V-10, 33ft. Lot of mountains and approx. 15000 miles. Average speed about 63, with 7.3mpg.


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Old 11-21-2011, 01:47 PM   #44
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I had the Ford V10 in my previous PaceArrow. My current Adventurer has the Workhorse 8.1. Both rigs are/were about the same weight and similar configurations. The toad previous toad weighed about 500lbs less, current toad just over 3k lb.
My best mpg on a nice flat road at 55 to 60mph is 8 or a slight 8+. Going over long steep grades like the I-5 grapevine or Oregon/Ca border area at 55 to 60mph I get around 5+mpg. When taking a trip I anticipate 7mpg in planning fuel stops, although I seldom go below 1/2 tank, as after a few hours I like to stop and walk around a bit anyway.
Hope this helps.
Happy Trails.

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Old 11-21-2011, 01:55 PM   #45
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I drive 432 miles ( big hills all the way) from Erie Pa to Wytheville Va. I fill up the 75 gallon tank and when I park at the Flying J I have just under a half tank. I have never figured the mileage out but I would guess some where near 10 per gallon. The coach weight is 25000 340 cummins. no toad. Our last coach weighed 3000 lbs less and with the Ford Triton V 10, same size tank.... I would have a quarter tank left with the same trip.
2008 Holiday Rambler Vacationer 340 Cummins
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Old 11-21-2011, 02:37 PM   #46
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That is like asking "who makes the best MH"? even 2 from the same mfg will get different milage because of the driver. We had a 36 ft w/ 260HP cummins and got 10-10.5 mpg. Now a 40 ft w/ cat c-7 350 hp and get 8 to 9 mpg. Usually drive at 60-62 MPH. Over 65 and millage drops to 6 to 7 MPG. We found driving at 55 didn't increase milage as dramatically as some claim. it takes so much energy to move so much weight. Period.
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Old 11-21-2011, 02:37 PM   #47
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Originally Posted by RJEV View Post
2008, V-10, 33ft. Lot of mountains and approx. 15000 miles. Average speed about 63, with 7.3mpg.

Very similar to my results, also have 5 Star Tune. I drive 60 to 63, I may try 59 to see if any difference
2005 Sightseer 29R, F53 Chassis-Sold
2007 HHR Toad -Sold, Hankook AH11,Magnum Plus Beads,Dahon Bikes, Roo Bee the "Aussie",SCT-5 Star Tune, Mountain Master Tow Brake,2009 Bighorn 3600RL
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Old 11-21-2011, 02:49 PM   #48
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2006 HR Admiral SE 35' 6.8L V-10, 5 speed transmission. 22,000 chassis. 26,000 GVWR.

My MPG range has been from 7.68 MPG to 9.1 MPG. My average speed on Highways is 65-70 MPH (2000-2200 RPM). no toad.
2006 Holiday Rambler Admiral SE 35' Ford Chassis
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Old 11-21-2011, 02:58 PM   #49
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7.5-8.5 MPG

Cummins ISL Coach weighed in at 31,000 pounds.
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Old 11-21-2011, 03:20 PM   #50
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Edallsails. It is hard to drive at 55 mph because the MH will stay in 5th gear and get low MPG unless you put it in Econo Mode take it up to 57-58 mph then let it shift into 6th gear then slow down to 55 MPH. No way would I want to drive at 55 MPH it is just too slow and I want to go to sleep. I have done it several times just to play with the MPG.
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Old 11-21-2011, 03:30 PM   #51
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Mike Canter: Are shift patterns different depending on the engine power? My 330 Cat shifts into 6th at 55 mph but will only drop a couple of mph before it drops to 5th gear. Seems I heard at a Freightliner session that some of the higher horsepower don't shift into 6th until about 65 mph. It doesn't seem to make a difference between econo mode and regular mode - Shifts into 6th at 55 unless I'm using a lot of throttle then it's at a higher speed.
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Old 11-21-2011, 03:54 PM   #52
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I've seen 45'ers with 500-600 HP (1500-1650 ft lbs torque) get as good a mileage as my ISC over the same route.
On the level at 60-62 I see over 14.0 mpg on my VMSpc, but I've also seen 3.0 mpg fighting a 30-40 mph headwind at 70 mph.
Overall average is somewhere around 8, I don't really check too closely.
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft
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Old 11-21-2011, 07:39 PM   #53
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It seems like most guys on this forum can get into 6th at around 57-58 MPH. I find that unless I am in economic mode I can't drop back to 55 MPH. I am almost 45' long znx 515hp with 1650 ft lbs of torque. At 62 MPH I am right at 1400 rpm. No Mr D I do not get better mpg because I weigh 46,000 lbs. These DPs regardless of weight and engine seem to all be designed to run at or close to the sweet spot of the motor.

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