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Old 10-05-2012, 12:13 PM   #15
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I run a 03 with an 02 ISL 400 pre emissions with ECM and 3000 allison my 42' dynasty is over 39000 and I have goldwing on back rack. I have to get over 58 mph to get 6th to lock up that is about 1580 rpm My 1200 ft lbs max torque is about 1400 rpms but that puts me in 5th gear. If there is no headwinds, I am not in colorado or out west, and I run around 1500 rpms I can get 7.8 mpg over man tanks of fuel. If I run 65 same conditions I get about 7 mpg.

My running partner has 45' ISX 600 a little more weight, geared so he is lower rpms and he is happy to get 6.5 on a downhill run.

Yep I have been looking at fuel prices from Mn to Tx and KC looks like the best place to get my first load of fuel on my way south.... I got fuel for 3.06 gal at superamerica with their double coupon on tuesdays and a 50 cent per gal coupon I wont do that good in Mo...
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Old 10-07-2012, 08:45 PM   #16
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I have a navigator with a 500hp cummins and get 7 mpg pulling a Enclave ,maybe could do better but I usually have my foot into it @ 68-70 mph. I think that the Cat engine will drink more.
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Old 10-10-2012, 08:07 PM   #17
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Our 45' Essex with Cummins 500 ISM gets 6.8 to 7.5 mpg. The biggest factor is climbing the mountains. Mileage drops dramatically going up. Gets some of it back on the way down, but never the whole loss. Wind is another big factor.

My non-rving friends always ask about fuel mileage. I explain that fuel costs are not even close to the highest costs of owning an RV. Capital costs, depreciation, maintenance, TIRES (just bought 6 new ones). Fuel is just one of the costs of living the great RV lifestyle. IMHO.
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Old 10-10-2012, 08:56 PM   #18
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2001 Monaco Dynasty Subaru toad ISC 350
In my next to last trip Dallas east to outer banks Boston return I averaged 7.2 mpg 60- 70 mph
Then last trip Dallas to Jasper return via Montana and Yellowstone I was thinking a tune up would be in order as I was only getting 6.5mpg.
Can't count how many times we crossed the continental divide.
Then from Silverthorn to Dallas 7.8 mpg
Once I got out of the hills and into flat ground - what a difference - the last legs were at 70 mph mostly so the 7.8 was a great result.
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Old 10-10-2012, 09:18 PM   #19
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So...why worry about the price of matches if you're smoking Cuban cigars?
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Old 10-10-2012, 09:37 PM   #20
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Quote:
Originally Posted by 336muffin
So...why worry about the price of matches if you're smoking Cuban cigars?
If the comment was meant for me!!
I fly from Australia twice a year to play with my rv
It costs $400 per month to keep coach and toad in indoor storage in Lewisville Tx
The amount spent on fuel is inconsequential in the scheme of things
Fact is just like a boat It's generally a minor % of the over all cost
Mpg is an interesting statistic - generally reflects both driving habits and engine efficiency.
Also I would love to be smoking Cuban cigars again but had to give up the habit 25 yrs ago
Happy motoring
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Old 10-10-2012, 10:47 PM   #21
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It was not aimed at anybody, just a remark.
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Old 10-10-2012, 11:09 PM   #22
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Quote:
Originally Posted by 336muffin
It was not aimed at anybody, just a remark.
The point you make is correct thou - it is a minor cost compared to the investment and annualized cost
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Old 10-10-2012, 11:20 PM   #23
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That was my point sir.
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Old 10-24-2012, 02:24 AM   #24
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I have a 500 ISM in a 2008 45' coach. I get 7-10 mpg.
It also depends what your gross vehicle weight is and the speed
and manner you drive and on the flats or the mountains.
Not sure if your 505 Cat will get as good mpg.
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