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Old 05-18-2015, 11:48 AM   #71
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Originally Posted by Ke5rbd View Post
You sure that isn't a 5.9 liter HO Cummins.
Yes you are right. 5.9

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Old 05-18-2015, 12:45 PM   #72
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Originally Posted by Qchair62 View Post
I get 19-21 empty, and 9-13 towing right around 10k bumper pull toy hauler. ST single cab with Cummins w/48re and 3.73 rear end. 5.9 is a sweet engine! Have to start watching for the bio blend. There have been times my mileage dropped for no reason (no wind increase, increase in hills, etc.) Anybody use cetane or two cycle oil and does any additive help your milage much?
I have been using 1/2 oz per gallon of the Waltmart 2 cycle for several years. I know it's good for lubing the injectors but can't say I've seen any increase in mileage. I did switch out the front hubs to free spin and gained a solid 2 MPGs. I get roughly 11 towing my 14K Heartland 5er, and 13 to 14 with the 34ft Salem Hemi

George Scott
2015 Salem Hemisphere Lite 272RLIS/ Prodigy P3
2006 Heartland BH 3400/Summer Home
2007 Dodge 2500 CDT QCSB/Blue Ox Sway Pro 1500lb WDH, Maxxis 8008 225 x 75 x15 LR E tires/J T Strongarms
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Old 05-18-2015, 02:16 PM   #73
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49 ft 5er towing from durham nc to Ashville nc cruise set at 65 9.7 mpg 07 duramax normal driving I get around 14-15.
2007 GMC 2500 Duramax Crew Cab LB
2008 5th Wheel Cardinal 36LE
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Old 05-18-2015, 04:22 PM   #74
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Location: Mount Dora FL
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12 MPG Fort Stockton to Las Cruces NM

Just got to New Mexico.Averaged 12 MPG even though there were some 4,000 ft elevations. Tucked in behind a 5th wheel and was getting 14-15 at times.
2014 Silverado Z71 4x4- 5.3
Flagstaff 21 FRBS
235 nights camping this past 30 months
31000 miles
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Old 05-20-2015, 08:41 PM   #75
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Turn your Eco off. And I only get 9 mpg won't my big block. Towing or not
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Old 05-23-2015, 11:22 AM   #76
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I have been looking at the Georgetown 35DL to replace my F-150 and 2703ws. I am now getting about 10 mpg but when I talked to a guy who owns that Georgetown and he says he gets 4 to 5 mpg towing a Honda crv, I'm having second thoughts. I think I will keep my money in the bank.
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Old 05-24-2015, 10:01 PM   #77
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Fully loaded with 50 gallons of fresh water
According to the panel on the dash 11 mpg

2014 cedar creek 36ckts
2014 Chevy 3500 1 ton crew cab 4x4 long bed.

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Old 05-25-2015, 03:09 AM   #78
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It is pretty clear the large Fifthwheels 12000 lbs. up get 10 to 12 with Diesel power and 7 to 8 with gas burner. I have always had Diesels to tow with and pulled 12000 plus 5th wheels and got between 11 and 12. Switched to gas burner as not doing nearly as much camping as did and am getting 7 to 8. Only do one big trip a year, so I can deal with it. Hopefully the Son in Law will go on and get a Ford diesel he has been talking about. Told him to get factory fifthwheel hitch option in it. We camp together most of the time anyway.
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Old 05-27-2015, 08:17 AM   #79
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Back & forth this weekend showed 12 mpg, I'm happy with that.
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Old 05-27-2015, 01:24 PM   #80
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Saw my lowest MPG's yet this weekend. We went camping in the mountains so it was all backroads and constant hill climbs (seemed like we were always going uphill... both ways... lol). Averaged 13mph for the trip. We were holding 18 up until we hit the actual mountains.

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