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10-21-2007, 05:15 AM
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#1
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Senior Member
Join Date: Aug 2007
Location: Gilford,Ontario
Posts: 1,050
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Our first trip to Quebec City covered 1200 miles most Highway driving, We got 11.4 MPG. NOW that is figuring Imp Gal at 4.54 lt per gal,or 9.6MPG when figuring in US gallons at 3.8 Lt per gallon.
We were not pulling anything and were running 65 to 70 MPH.
Rick
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'05 Kountry Star 3910 ISC 330 Cummins '08 Jeep Wrangler Four Door Blue Ox
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10-21-2007, 05:15 AM
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#2
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Senior Member
Join Date: Aug 2007
Location: Gilford,Ontario
Posts: 1,050
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Our first trip to Quebec City covered 1200 miles most Highway driving, We got 11.4 MPG. NOW that is figuring Imp Gal at 4.54 lt per gal,or 9.6MPG when figuring in US gallons at 3.8 Lt per gallon.
We were not pulling anything and were running 65 to 70 MPH.
Rick
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'05 Kountry Star 3910 ISC 330 Cummins '08 Jeep Wrangler Four Door Blue Ox
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10-21-2007, 08:30 AM
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#3
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Senior Member
Join Date: Apr 2007
Posts: 544
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You did better than me; my first trip was 9mpg, while after that was 8.6 (but I was pulling an H2). I've noticed that speed, wind, and mountains are the big factors.
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'06 Essex 45'
Hummer H2
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10-21-2007, 03:18 PM
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#4
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Senior Member
Newmar Owners Club
Join Date: Apr 2007
Location: Panama City, FL
Posts: 139
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Maybe I better go back to the Cummins dealer. On a 7500+ mile trip this summer my Trip Tech says 7.0 MPG average for the whole trip!
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Wayne H. & Nixie Miller
2006 Newmar Dutch Star 4027
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10-21-2007, 03:27 PM
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#5
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Senior Member
Newmar Owners Club
Join Date: Jul 2006
Location: Wellington, Florida
Posts: 6,933
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My MPG has been a rock solid 7.3 over the first 28K miles. The current trip and the last 2K miles have gotten 7.5 MPG. I travel 60/62 MPH. Congrats on your higher mileage. It is highest I have heard from owners of coaches like ours. Don't get too excited yet. There could have been a number of factors that were in your favor and unseen. Wind and weight play a big role in fuel mileage. Good luck.
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Gary
2005 Newmar KSDP 3910,
The Avatar Is Many Times Around The USA
Nobody Knows Your Coach Like Somebody Who Owns One Just Like Yours
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10-21-2007, 04:49 PM
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#6
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Senior Member
Join Date: Aug 2007
Location: Gilford,Ontario
Posts: 1,050
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I 'Hear Ya' Gary The wind was fairly light except the last day and as I said 'No Toad'
Rick
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'05 Kountry Star 3910 ISC 330 Cummins '08 Jeep Wrangler Four Door Blue Ox
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10-21-2007, 05:38 PM
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#7
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Senior Member
Join Date: Apr 2007
Location: Utah/Florida
Posts: 351
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I've been getting 6.8 to 7.6
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2011 Tiffin Allego Bus 40QXP
450 hp Cummins ISL 9, Powerglide chassis
Toad, 2011 Honda CR-V
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10-22-2007, 03:01 PM
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#8
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Senior Member
Join Date: Aug 2007
Location: Gilford,Ontario
Posts: 1,050
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Hey R-r!!! 6.8 to 7.6 Does seem a little low!!!
Rick
__________________
'05 Kountry Star 3910 ISC 330 Cummins '08 Jeep Wrangler Four Door Blue Ox
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10-22-2007, 03:23 PM
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#9
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Senior Member
Join Date: Jul 2007
Location: my 3950 :)
Posts: 298
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My first 7,000 miles is averaging 6.5MPG this is pulling a 25ft TT with a GCVW just under 35,000 lbs.
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Nathan Focht
Wife, 3 kids, and mother-in-law
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10-22-2007, 04:28 PM
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#10
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Senior Member
Join Date: Aug 2007
Location: Gilford,Ontario
Posts: 1,050
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Hey Nathan!! I can see your 6.5 is pretty good with the TT!!! My total GVW would be about 29000lbs and no Toad!!!
Rick
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'05 Kountry Star 3910 ISC 330 Cummins '08 Jeep Wrangler Four Door Blue Ox
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10-23-2007, 03:09 AM
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#11
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Senior Member
Join Date: Feb 2005
Location: Lake Oklawaha RV Resort(\
Posts: 1,185
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Your fuel mileage on most of these coaches will run from 6.5 to 8(depending on speed). Any other reading is wind, etc. aided.
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10-24-2007, 01:40 AM
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#12
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Junior Member
Join Date: Jan 2007
Location: Florida
Posts: 29
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WOW - we get excited when we can actually get 6.0 MPG. We slowed down to run no higher then 1500 RPM's to get 6.0MPG prior to that - while going the speed limit we got average of 5.5MPG. I am impressed! Find it hard to believe but impressed none the less.
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George and Carol
07 Essex 4502
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10-24-2007, 11:13 AM
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#13
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Senior Member
Newmar Owners Club
Join Date: Sep 2006
Location: North Java New York
Posts: 1,300
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6.3 - 6.8 here. I have looked into it quite a bit and this is normal for my powertrain, axle ratio and chassis. I travel at 65 - 68 mph usually.
BTW, I once got 7.5 headed out to Nappanee w/a monster tailwind this past winter.
.1 miles per gallon less for every 1 mph faster you go is the rule of thumb. If you do a search on this forum, I posted a paper from Cummins' website that laid out all the factors. Speed was number one and I think tires were number two.
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Scott Crompton
07 Dutch Star 4304
Sue (DW)  Celia 10, Alec 8, Bella (Greyhound), Isis (Abyssinian) 
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10-24-2007, 12:29 PM
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#14
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Senior Member
Join Date: Jul 2007
Location: my 3950 :)
Posts: 298
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I put mine on 60MPH and leave it.
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Nathan Focht
Wife, 3 kids, and mother-in-law
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