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Old 05-30-2012, 11:37 PM   #31
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Haven't done any long hauls. Just some short 50 milers. Windy roads 50-65 mph. Averaged 14 mpg in the BMW X5 diesel pulling a sp220 trailer weighs 4200 empty, don't know how much all my stuff weighs. X5 usually gets 25-27mpg without the trailer.
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Old 05-31-2012, 04:38 AM   #32
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Question

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Originally Posted by william.migues View Post
I have a 2012 F250 Lariat with the new 6.2L gas engine. I'm getting 9 mpg pulling a 12000 lb 5th wheel and 13-14 unloaded on the highway.
Have you towed your 5th wheel thru Mountains ?? or i should say over them..
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Old 05-31-2012, 05:17 AM   #33
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Average according to the DIC I am averaging 20.5 mpg (Empty) around here. 2 lane 55mph and 10 miles in between stop signs...... Yes I live in BFE

Need to tow more for Tow MPG
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Old 05-31-2012, 06:21 AM   #34
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drag/weight

Greater airflow = more drag = more gas...more weight = more gas to get the rig moving...MPG = gas used per mile...so reduce airflow and reduce weight and use less gas...reduce rpms and get to highest gear possible to use less gas...change from offensive driving to defensive driving...that can
help too...think airspeed instead of mph-meaning drag rapidly increases as airspeed increases. That being said, driving 50 mph with a 20 mph head wind = 70 mph flowing against the barn door....and for those who drive 65 just do the math....and realize your drag may more than double....gravity
adds weight to the mass you pull so going uphill you are pulling against it and going down hill you are trying to stop it = more gas in both directions.

Bottom line is you need a really big tank for the gas to go just a little ways down the road.....and that adds more weight that = more gas.......

Thanks everyone for all the good input.....and just remember that time you got that 14 mpg was that tailwind on flat ground.....
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Old 05-31-2012, 06:28 AM   #35
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Quote:
Originally Posted by sail2liv
Greater airflow = more drag = more gas...more weight = more gas to get the rig moving...MPG = gas used per mile...so reduce airflow and reduce weight and use less gas...reduce rpms and get to highest gear possible to use less gas...change from offensive driving to defensive driving...that can
help too...think airspeed instead of mph-meaning drag rapidly increases as airspeed increases. That being said, driving 50 mph with a 20 mph head wind = 70 mph flowing against the barn door....and for those who drive 65 just do the math....and realize your drag may more than double....gravity
adds weight to the mass you pull so going uphill you are pulling against it and going down hill you are trying to stop it = more gas in both directions.

Bottom line is you need a really big tank for the gas to go just a little ways down the road.....and that adds more weight that = more gas.......

Thanks everyone for all the good input.....and just remember that time you got that 14 mpg was that tailwind on flat ground.....
Yes all very true, but it is the end result that makes it all worth it!
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Old 05-31-2012, 06:58 AM   #36
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The price we pay to camp!! Done figured out my gas bill prior to leaving to Yellowstone for 2 weeks. I will know how close my estimate is in a month when we return.
7.5 mpg / 3500 miles x $3.89/gal = $1815.33....
Makes for a large Amex bill!
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Old 05-31-2012, 07:05 AM   #37
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Most of the campsites I go to involve a fair amount of hwy driving. I have a 2011 Ram 1500 5.7 Hemi 3.55 axle ratio. It is pulling a Rockwood Roo 233s (about 5200 loaded)

I haven't made that many trips but I am averaging 11.15 mpg (21.1 litres / 100 km) with tow/haul.

Without any load 15.58 mpg (15.1 litres / 100 km)

I do tend to baby the throttle.
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Old 05-31-2012, 07:40 AM   #38
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2011 Ford F150 Ecoboost Supercab hauling 27RKSS Salem 2012. Gets better mileage at 13 heading down interstate 95 than heading back up the same hwy at 10 mpg. Maybe becasue its heading North and back to Canada's cheap $6 a gallon gas.
Maine gas dropped 10 cents a gallon last night ours went up 33 cents. All based on the NYH exchange.
Its why we haul 2 hours to vacation in the USA.
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Old 05-31-2012, 07:44 AM   #39
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I have a 2005 Dodge Ram 3500 CTD 12.5-13.0 towing @ 60 mph not towing 16-17

my last truck was a 2002 Chevy silverado 2500 6.0 gasser towing 8-9 not towing 11-12
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Old 05-31-2012, 08:43 AM   #40
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Quote:
Originally Posted by dretired View Post
Have you towed your 5th wheel thru Mountains ?? or i should say over them..
No, I live in South Louisiana; no mountains here. No plans right now to pull to any mountains.
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