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03-29-2014, 11:12 AM
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#1
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Senior Member
Join Date: Apr 2008
Location: West Valley City, Utah
Posts: 551
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fuel economy & speed-interesting article
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2014 Chevy Silverado
2011 Rockwood Roo 233S
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03-29-2014, 11:33 AM
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#2
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Senior Member
Join Date: Feb 2014
Posts: 1,428
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From someone in the automotive world, this is an excellent article!
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Now-2014 Sierra 346RETS 5er BUB
Then-2002 Keystone Springdale 286RLDS TT
Nights camped in 2014-28, 2015-127, 2016-10
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03-29-2014, 11:34 AM
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#3
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Senior Member
Join Date: Jan 2010
Location: Central, Fl.
Posts: 1,330
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Good read.
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2018 Forester 3011DS (Purchased 04/26/17)
2010 Flagstaff 26 RLSS (Sold 05/16)
2012 Ford F-150 Ecoboost, Screw, H/D, 3.73
1930 lbs CCC
2014 Jeep Rubicon JK
Going where the weather suits my clothes.
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03-29-2014, 11:35 AM
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#4
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Senior Member
Join Date: Nov 2013
Location: Whereever our Berkshire is Parked!
Posts: 7,082
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Hmmm...interesting article - looks like it is aimed towards semi drivers, but I suspect the basic math will transfer to RV drivers/draggers
So the bottom line is this from the article:
Increasing speed from 55 to 75 mph can increase fuel consumption by 39 percent, while cutting the effectiveness of fuel-efficient tires by 27 percent.
I'm not so sure I would want to pull my 5er at 75 anyway (65...yeah I do occasionally)
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Bob & Anne-Marie [BamaBob & 6 Actual]
| 2017 Berkshire XLT 43A with Ultrasteer Tag | Blue Ox Avail + KarGard II |
| SMI AF-1 Air Brake | 2016 Jeep Cherokee Overland TOAD | Pedego Bikes |
Nights Camped: 2013 - 24 • 2014 - 42 • 2015 - 56 • Jul 2016 - Fulltime •
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03-29-2014, 12:13 PM
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#5
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Camper Less Camping
Join Date: Apr 2012
Location: NW
Posts: 3,642
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I need to have a talk to my Duramax...the heavier the load I ask it to tow...the faster it wants to roll down the highway...it's almost toying with me to make it break a sweat! ,)
Good article
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2013 Sabre 32RCTS-6 (sold)
Family of 4 whose always on the GEAUX!
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03-30-2014, 08:37 AM
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#6
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Senior Member
Join Date: Nov 2011
Location: Long Island N.Y.
Posts: 419
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Good article thanks for sharing
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2013 Wildcat 323QB
08 Silverado Crew Cab 2500HD Duramax-Allison
Twin Honda 2000 campsite friendly generators
Nights camped in 2014 = 19
(2013 = 36)
(2012 = 42)
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03-30-2014, 08:50 AM
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#7
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Senior Member
Join Date: Apr 2011
Location: Central Nova Scotia
Posts: 519
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I always found I got the best fuel mileage at 90 to 100 kph.
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2011 Salem 30kqbss
2013 Ram 2500
2005 Ram 2500
1968 Pontiac Le Mans
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03-30-2014, 09:01 AM
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#8
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Senior Member
Join Date: Oct 2013
Posts: 1,443
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Never new this but did find that driving 55 mph I gained a couple of miles per gallon, waiting to see how my new v lite does on the interstate at 65 mph.
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03-30-2014, 10:48 AM
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#9
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Senior Member
Join Date: Feb 2014
Location: Lexington, Kentucky
Posts: 115
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According to my logs (old habits die hard) my fuel economy is about %15 better at 65 than 72 in my daily driver sedan. Since we never break 65 with the camper attached to the truck I can't say on the 72-65 difference, but the difference between 55 and 65 is almost %15. Now, if we could just get rid of the crap they water the gas down with I'd get my %11 back from that too!
I also found the engine life/wear and tear factor, as well as that of the tires, an added incentive to slow it down a bit.
- Randy
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1975 Westfalia (VW)
2014 Rockwood A122
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03-30-2014, 11:05 AM
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#10
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Moderator Emeritus
Join Date: Mar 2008
Location: St. Paul, Minnesota
Posts: 3,365
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Air resistance is not a linear resistance. It works on the square of the speed. Double the speed; you get 4 times the air resistance. It takes 4 times as much energy to combat air resistance at 60 mph versus 30 mph. So, their graphs all make sense. It is easy to see how air resistance becomes the dominant factor as speed increases.
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2021 F350 Lariat 7.3 4X4 w 4.30s, 2018 Wildcat 29RLX
2012 BMW G650GS, Demco Premiere Slider
1969 John Deere 1020, 1940 Ford 9N, 1948 Ford 8N
Jonsered 535, Can of WD-40, Duct Tape
Red Green coffee mugs
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03-30-2014, 08:02 PM
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#11
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Senior Member
Join Date: Oct 2013
Posts: 1,443
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Quote:
Originally Posted by WrongWayRandall
According to my logs (old habits die hard) my fuel economy is about %15 better at 65 than 72 in my daily driver sedan. Since we never break 65 with the camper attached to the truck I can't say on the 72-65 difference, but the difference between 55 and 65 is almost %15. Now, if we could just get rid of the crap they water the gas down with I'd get my %11 back from that too!
I also found the engine life/wear and tear factor, as well as that of the tires, an added incentive to slow it down a bit.
- Randy
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you can get rid of the ethanol but its going to cost you a lot more per gallon got to go up to the 93 oct. to get ethanol free. was thinking about trying this when I tow just to see if its worth it.
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03-30-2014, 11:47 PM
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#12
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Senior Member
Join Date: Oct 2012
Location: In our CC.
Posts: 646
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Yeah, whatever Acadianbob said! I keep our speed to a max of 65 mph. What's the hurry to set up camp? RV'ing: it's the journey, sometimes more than the destination. Sort of like the Road to Hana (Maui, HI)
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Alan, Kathy & Cooper the camping cat
2014 Cedar Creek, 36CKTS
2013 GMC 2500 Denali
Duramax/Allison
Full timers since 5/30/2013
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