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Old 12-08-2006, 10:37 PM   #29
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1973 27' Overlander
1972 29' Ambassador
St. Paul , Minnesota
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99 F-150 5.4L 4x4 auto w/ offroad package: when gas was $3 a gallon I went to dollars per hour so my 14 mpg max-conservation mode at 55ish was $11.75-an-hour cruise vs. $17-19 at 70 with TV / trailer both in need of a wash and wax. Also I am thinking about an air dam to attach under front bumper only while towing to keep my lifted trucks slipstream cleaner, the big OTR semi-rigs use them...
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Old 12-08-2006, 11:15 PM   #30
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2006 16' International CCD
New York , New York
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17 MPG towing
25 MPG solo average
40 MPG driving 40-50MPH for any distance
2006 Highlander Hybrid and 16' Bambi Quiksilver
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Old 12-09-2006, 12:34 AM   #31
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2007 25' International CCD FB
1970 23' Safari
1956 16' Bubble
Jamul , California
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On our last trip, San Diego-Montana-Tetons-Colorado-Home run...
14 MPG towing Average with 17.8 best mpg at normal 60mph
18 MPG solo is normal tops average for 5.3 Silverado
Run safe!
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Old 12-09-2006, 02:33 AM   #32
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1977 25' Caravanner
Jeffersonville , Kentucky
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1999 Chevy 350 Vortec , 3;73 gears 14 MPG with 1977 25 footer on Interstate

empty , 16 on Interstate
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Old 12-09-2006, 06:26 AM   #33
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2007 Chevy 2500HD Duramax crew cab short bed 4x4 pulling our 28' International, 60 mph yields 14 to 15 mpg, 65 mph will drop it down to the mid 13 mpg range. 65 mph solo will get about 21 mpg and 70 mph is about 19 mpg. 55mph will net around 24 mpg. Around town is about 14 to 15 mpg. Throw in a stiff head wind or a mountain grade and everything drops fast, just like any other tow vehicle
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Old 12-09-2006, 06:56 AM   #34
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1996 34' Excella
Americus , Georgia
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I have a 1991 34 ft Excella and use two different tow vehicles. One of them is a 2004 Suburban 1500 2WD 5.3 eng.,3.73 axle ratio, and it gets on average 12 mpg towing here in GA and 19.5 mpg solo hwy. I also have a 1994 Chev. Crew Cab Dually with a 6.5 turbo diesel,2WD,auto, and 4.10 axle ratio and it will get on average 10.5 mpg towing and 15 mpg solo hwy with a fuel additive. So right now with diesel being $ .30 p/gallon higher than reg unleaded I am using the Suburban to tow with and it does a good job. Those 5.3 engines like the higher RPM`s but above 2500rpm mine pulls real good. Davis
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Old 12-09-2006, 07:47 AM   #35
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I have a 2006 GM XL Envoy inline 6 with 295 hp pulling a 1965 17' Caravel (2250 lbs) no better than 12 mpg at 65 miles per hour
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Old 12-09-2006, 07:57 AM   #36
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A pretty steady 15 MPG is what Chummy gets. We just started pulling a car on a dolly and have yet to check the mileage but it probably will not change much, since mountains, wind, or road condition does not affect mileage.
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Old 12-09-2006, 10:08 AM   #37
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2005 25' Safari
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1999 F250 diesel six speed pulling 25' Safari. On trips with mostly flat 60 MPH cruising 14.5-15 MPG. Example a trip from Orange county CA to Gilroy CA. via Tejon pass with no stop and go traffic.
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Old 12-09-2006, 11:13 AM   #38
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Yucca Valley , California
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97 Suburban 1500, currently 140kmiles
solo mixed driving yields 14.5mpg average
solo hwy mileage usually just below 19
towing my 1963 Overlander averages 12mpg. Sometimes a little better, rarely worse. I set teh cruise control to 62mph (100 km/h). I do use overdrive on flat/non windy stretches of highway, but take it out at the slightest hint of driveline strain.
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Old 12-09-2006, 11:34 AM   #39
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2007 25' Safari FB SE
rio rico , Arizona
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2006 Chevy Express 3500 van(extended wheelbase) with downrated Duramax empty gets about 19-22 mpg @ 60mph. With 2200#s of cargo, I got 23.1 mpg once keeping it at 55mph, and that's going over the mtn's to Seattle. This is with a Predator tuner with the lowest tune for towing and mileage. This tune adds about 45 more HP and a little more torque bringing the total HP up to about 295, if you believe all the advertising and hype! But it seems to work. That's still less hp than the standard Chev PU w/Duramax.
Now...towing. With the van loaded and towing a 22' CCD on the interstate, over the mtns, we averaged about 17-19mpg @ 55mph. Haven't had a chance to put the new 25' Safari thru the paces yet, but I think I'm looking at 15-17 mpg @ 55mph. That maybe optomistic, but hope springs eternal!
A side note, the Predator tuner has lowered the shift points somewhat, and with the gain in hp and torque, the tranny doesn't automatically shift down going up grades. Tranny temps have never gone over 175 degrees, so I don't think I'm abusing it, no small worry with the 4L80E tranny.
Of course, I may be all wrong about all of this....
Cheers, Jeff
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Old 12-09-2006, 11:42 AM   #40
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1964 22' Safari
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With the '99 4x4 Dodge v10 3/4 ton, using regular unleaded gas, and towing the '64 22' Safari, we get a consistent, whopping 9 m.p.g. whether we go on a level path or uphill driving.

When not towing, we still get a whopping 9 m.p.g. on a level path or when uphill driving.
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Old 12-09-2006, 01:05 PM   #41
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We have an 02 Avalanche pulling a 19' 01 Bambi and travel about 10,000 miles per year across the Rockies and through the midwest and west. We have averaged 11.7mpg over the last 16,000 miles of towing. I hold the speed at about 67 (65 on the gps), use tow-haul mode in the mountains but not on flat-land, and use cruise most of the time.
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Old 12-09-2006, 01:19 PM   #42
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gallons per mile.....

With a 2001 Dodge 2500 Ex-cab short bed (4WD 5.9 24 valve Cummins) and a 1972 23' Safari, we averaged 12-13 MPG over 5500 miles......lots of mountain travel (UT,WY,MT, ID, WA, OR, CA, NV, AZ). I add a pint of PowerSource fuel conditioner every 1500 miles or so (keeps the injectors clean and prevents fuel jello in winter). The truck seems to like 60-65 MPH for towing speed.
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