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Old 02-14-2011, 03:38 PM   #21
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Nice! Then you know that NONE of that aerodynamic discussion applies to you. Helicopters do not fly using principles of aerodynamics. They just BEAT the air into submission.
I prefer to think of it as a collection of loose parts flying together in a tight formation.....
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Old 04-09-2011, 10:56 PM   #22
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Just be glad you don't have a Hemi! I am off to get a second job so I can afford to pull my camper to the KOA on the edge of town! (1/8 of a mile away)
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Old 04-10-2011, 07:10 AM   #23
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Just be glad you don't have a Hemi! I am off to get a second job so I can afford to pull my camper to the KOA on the edge of town! (1/8 of a mile away)
???

I pulled our 34' V-Lite 6000km last summer and got 11.2 average at 60mph with 4 people in the truck. On a good day with no head wind I can get up to 22 on the highway and generally get 13 to 14 around town.
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Old 04-10-2011, 08:11 AM   #24
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???

I pulled our 34' V-Lite 6000km last summer and got 11.2 average at 60mph with 4 people in the truck. On a good day with no head wind I can get up to 22 on the highway and generally get 13 to 14 around town.

Is that kilometers per imperial gallon (4.55L)?

The best I have ever got with my Power Wagon (5.7L Hemi powered) is 15.5 miles per U.S. gallon (3.79L). That is empty highway driving. Towing I average 8.5 MPG.
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Old 04-10-2011, 08:34 AM   #25
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Miles per imperial gallon. So I guess for US just subtract 20% I think it is. Although in your trucks defence, the 4:56 gears probably have alot to do with it vs the size and weight of the Megacab with 3:73's.
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Old 04-10-2011, 08:47 AM   #26
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I run a Hemi with 3.92 gears and 35" all terrain tires - I average between 9mpg and 11mpg towing (doing 55)

without anything loaded I average 12mpg to 14mpg (70mph to 80mph) - I am also running superchips with the shift points so it allows me to change the tune of the truck so the computer is diffrent on each tune - the down fall to running the superchips is that I have to run super unleaded and with a 36 gallon tank it puts a hurting on the wallet
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Old 04-10-2011, 08:58 AM   #27
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Miles per imperial gallon. So I guess for US just subtract 20% I think it is. Although in your trucks defence, the 4:56 gears probably have alot to do with it vs the size and weight of the Megacab with 3:73's.
There are definitely many factors which effect MPG, such as gear ratio, weight and frontal surface area. I just was not aware of anyone with a Hemi 2500 getting 22MPG on the U.S. system. Just wanted to clarify.
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Old 04-10-2011, 09:04 AM   #28
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I run a Hemi with 3.92 gears and 35" all terrain tires - I average between 9mpg and 11mpg towing (doing 55)

without anything loaded I average 12mpg to 14mpg (70mph to 80mph) - I am also running superchips with the shift points so it allows me to change the tune of the truck so the computer is diffrent on each tune - the down fall to running the superchips is that I have to run super unleaded and with a 36 gallon tank it puts a hurting on the wallet
I get about the same MPG. I have a Hemi, 4.56 gears and 33" all terrains. I average 8.5 MPG towing ( I have more frontal surface area with a 5'er than you do with a TT), 11 MPG city, 13 MPG empty highway @ 75-80 MPH and 15 MPG empty highway if I stay below 65 MPH.

Of course none of this helps the OP with his CTD MPG concerns. Sorry for the hi-jack! We now return to our regularly scheduled topic.........maybe.
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Old 04-10-2011, 10:33 AM   #29
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Diesels and/or properly setup up TVs don't lose that much MPG when towing from what I understand. Torque is what does the work (moves the load) and high gearing multiplies torque and diesels have loads of torque.

My expy (5.4 gas, 3:55, AWD) gets 12 around town and 15 on the hiway with no towing, and I expect 9-10 when towing at 55-60mph. We'll see how that goes. The Gray Wolf looks to be more aerodynamic on the front than most trailers (very sloped front of the smooth plastic, but still has the washboard alum sides). No idea what impact an suv or capped pu would have over an open bed truck in wind resistance.

The towing MPG isn't too big of a concern as if we tow it 400 miles a year I'd be surprised. Is all the other driving around that eats the gas.
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Old 04-10-2011, 11:30 AM   #30
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My Parents own a 2001 Dodge with the 5.9L 24 vavle cummins diesel and they towed a 5th wheel (I think it was 35 feet) and were averaging around 10 mpg - unloaded it was around 20mpg - of course my father drives like an old lady so that will make a diffrence in the way your driving style is also.

I know that the OP has a 2010 Diesel so he has the 6.1L and not the 5.9L Diesel.
EGT's (Exhaust Gas Temps) are what kill the diesel's so if it was me I would definatly get EGT Gauge installed so you know where you are at and if the temp's get up there it might be a well worth investment to go to a larger piped exhaust which will help the diesel breath.
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Old 04-11-2011, 08:44 PM   #31
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The newer diesel's do not get the mileage they used to all due to the emissions constrictions from our lovely government, That said, my 2011 CTD gets 16-18 empty on they interstate at 75 mph, I have not towed enough to get an accurate measurement, but the last trip I drove I was getting 12 mpg overall, I DO NOT expect to get more than 10 mpg on a regular basis pulling. Might I refraise "I hope to get 10 mgp pulling"
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Old 04-13-2011, 09:22 PM   #32
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Hey flyrotor,

Congrats on the 2011 ram, I like the new looks of them and i have thought about trading in again, but I am tired of making payments, so for now....I just look. LOL. Anyway, it's my opinion that you could probably do better than 10mpg on a consistent basis...at least prior to going into a regen. Over the last few years, I've subscribed to a cummins forum and tried to learn as much as I can about our trucks and I think you might find some helpful info there too. But I wanted to mention to you that under my own findings, if I keep the rpm under 1900 at all times...and do my best to keep the turbo from pushing over single digits, you can get some pretty surprising numbers. Around here, it's pretty tough to keep the vehicle under 70mph due to traffic flow, but the last time I made a road trip (empty), I kept the cruise at 68mph and achieved a 20.18mpg on that tank. The worst I've done pulling the roo is 14mpg, but that's going over 4 different mountain passes stretching from northern Colorado to southwestern Colorado. Granted, I'm not pulling your specific trailer nor do I have same specs on the truck, but I think the principle would be the same...might be worth a try and see how it goes.

(before my comment on my fuel mileage starts a whole new conversation, I'll just say that I eliminated as many variables as I could to get the most accurate reading that i could and added it to a years worth of stats that I've kept.). Oh and last I read, the overhead console reading still isn't accurate to any extent, so I wouldn't rely it to tell you the truth.

Joe
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Old 04-13-2011, 11:50 PM   #33
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Last fall travelling from Ont. to BC we went 4858 kilometers or 3018 miles and used 1130 liters of fuel or 299 gals. Averaged 10 miles per gal. at 55 to 65 miles per hour. We had some large mountains in BC and the hills around Northern Ontario. I cannot complain about the gas milage. I try not to use gas mileage and truck in the same sentence. I did not purchase a truck to get high gas mileage. It I wanted gas mileage I would buy a Smart car. But I could not tow a TT with a Smart car. I think that the V nose of the Windjammer helps with the gas mileage.
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Old 04-14-2011, 05:44 PM   #34
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Hey flyrotor,

Congrats on the 2011 ram, I like the new looks of them and i have thought about trading in again, but I am tired of making payments, so for now....I just look. LOL. Anyway, it's my opinion that you could probably do better than 10mpg on a consistent basis...at least prior to going into a regen. Over the last few years, I've subscribed to a cummins forum and tried to learn as much as I can about our trucks and I think you might find some helpful info there too. But I wanted to mention to you that under my own findings, if I keep the rpm under 1900 at all times...and do my best to keep the turbo from pushing over single digits, you can get some pretty surprising numbers. Around here, it's pretty tough to keep the vehicle under 70mph due to traffic flow, but the last time I made a road trip (empty), I kept the cruise at 68mph and achieved a 20.18mpg on that tank. The worst I've done pulling the roo is 14mpg, but that's going over 4 different mountain passes stretching from northern Colorado to southwestern Colorado. Granted, I'm not pulling your specific trailer nor do I have same specs on the truck, but I think the principle would be the same...might be worth a try and see how it goes.

(before my comment on my fuel mileage starts a whole new conversation, I'll just say that I eliminated as many variables as I could to get the most accurate reading that i could and added it to a years worth of stats that I've kept.). Oh and last I read, the overhead console reading still isn't accurate to any extent, so I wouldn't rely it to tell you the truth.

Joe
Thanks for the info, my mileage estimates were with the onboard computer, not that I trust it to any extent, but just as a guide. I'm not too worried either way as I know it will never be great, however, it matches or beats my 1/2 ton suburban and has much more muscle so I have accomplished my real needs with the power
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