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Old 03-03-2014, 05:52 PM   #1
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Fuel mileage questions

I have a 2013 Sports Coach 405FK with a 340 Cummings Diesel. On our first long trip I got 10.6 MPG heading south (NJ to FL) and 10.5 heading north. I kept the cruise set at around 68 MPH w/o toad.
What type of fuel mileage is everyone else getting? Also if you have a toad what does it drop down to? When I tow my Grand Cherokee (sort trips) I get around 9.0
Last question, is there any chip or anything other then slowing down that will allow me to get better fuel mileage?
Thanks for your input.
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Old 03-04-2014, 06:49 AM   #2
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Haven't had the opportunity to check fuel mileage yet, our first longer trip will be in about 6 weeks. We will be heading to Georgia with our Wrangler toad. I certainly will post the results.
It's good to know from my stand point what your results were, pretty encouraging.
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Old 03-04-2014, 08:14 AM   #3
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I'm in a gas rig, so whole different animal, but I've read for better diesel mileage to drop down a few mph, into the low 60s. Not sure how much that will gain for you, though, since you seem to be right about where most are - give or take.
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Old 03-04-2014, 08:20 AM   #4
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10.5 seems pretty normal.
My boss gets 8 -10 with his Cummings in his 40' mh.

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Old 03-04-2014, 08:21 AM   #5
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Quote:
Originally Posted by go6car View Post
I'm in a gas rig, so whole different animal, but I've read for better diesel mileage to drop down a few mph, into the low 60s. Not sure how much that will gain for you, though, since you seem to be right about where most are - give or take.

65 is my max speed, when I was in a gasser and now the diesel. I liked the looks of the 10+ mpg, we are hoping for 9 with a toad. Our gasser was at best maybe 6.5 with a toad, 7.5 without. We are looking for longer distances between fuel stops and better milieage....even with diesel being more expensive, we 'should' do better $$ wise with diesel.

But then again, if you are concerned about fuel cost.....DON'T BUY AN RV!!
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Old 03-10-2014, 11:23 PM   #6
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10 no toad, about 9 to 9.5 with toad
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Old 03-14-2014, 10:26 AM   #7
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At Camp Freightliner we were told to run at 1750 rpm which is normally between 63 and 65 mph. With our toad, which GM states should not be towed faster than 63 mph, we are in the 10.5 range. Actually experienced 11+ in the Colorado mountains this past summer. We have a Cummins 340 hp.
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Old 03-14-2014, 12:01 PM   #8
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great info

Thanks MPVMich, that's helpful information. I'll try slowing down but that's going to be hard.
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Old 03-14-2014, 12:43 PM   #9
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Quote:
Originally Posted by mvpmich View Post
At Camp Freightliner we were told to run at 1750 rpm which is normally between 63 and 65 mph. With our toad, which GM states should not be towed faster than 63 mph, we are in the 10.5 range. Actually experienced 11+ in the Colorado mountains this past summer. We have a Cummins 340 hp.

1750 rpm it is.....We are in no hurry anyway... 10.5 is excellent with a toad!
I like it!
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Old 04-06-2014, 08:26 PM   #10
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We get an average of 10.5 mpg with our 2012 Sportscoach. It has the same chassis and diesel as yours. We have travelled through most areas of the country and haven't seen any substantial differences. Mike at Camp Freightliner advised us that the optimum performance of the engine was obtained at 1750 rpm. For us it equates to 63-64 mph. Factory recommends that our Saturn Vue not be towed over 65 mph, so it all works for us. We are very happy with the Freightliner/Cummins combo.
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