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Old 10-09-2012, 01:11 PM   #99
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Last 400 mile trip; 16 mpg towing 2007 27FB at ~60 MPH and average 21 MPG solo hwy @ ~70 MPH with 2012 F250 6.7L diesel. MPGs were manually calculated. I'm happy.
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Old 10-09-2012, 01:47 PM   #100
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Originally Posted by REDNAX View Post
CPM is the easiest way to understand fuel cost. The other is to understand the way those in other countries look at liters of consumption per 100-kilometers, so, for us, as gallons per 100-miles.

At an estimated 15-mpg towing (level terrain), it would be 6.6/100

CPM or [per 100] is much the easiest way to trip plan.


.

Calculating CPM may make you feel good (or bad) about the overall cost of vehicle ownership and use, but it is not a valid metric for comparisons of fuel economy, as it introduces variables (fuel cost, capital, depreciation, insurance, maintenance etc...) that have no direct relationship to the efficiency of the vehicle. There are many variables in the cost of towing a trailer, but for the sake of practical comparisons, KISS leaves us with mpg as the common metric in the USA.
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Old 10-09-2012, 09:21 PM   #101
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Calculating fuel cpm is the point. The overall cpm is much higher, thus not shown.
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Old 10-10-2012, 08:26 AM   #102
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Originally Posted by REDNAX View Post
Calculating fuel cpm is the point. The overall cpm is much higher, thus not shown.
Sorry RED, I missed your point. Agree that fuel cpm is fine for estimating that aspect of your trip cost, (like food cost per day). It is not meaningful for the vehicle efficiency comparisons in this thread.
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Old 10-10-2012, 09:07 AM   #103
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The bottom line of fuel efficiency is out-of-pocket cost to get the job done, or it is meaningless. Why spend $50,000 to get a few more miles per gallon, when you can get a less fuel efficient but capable tow vehicle for $25,000?

This is the question is asked myself when I compared a VW Touareg TDI with a Dodge Ram Express 5.7 gas, and bought the Dodge.

There are many similar examples. Fuel efficiency can be very expensive.

doug k
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Old 10-10-2012, 11:03 AM   #104
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03 F350 CCSB SRW, 7.3L psd bone stock 4x2. I tow a 1990 29' Excella. I dont have an exact figure, but its in the 13 to 14 mpg range on long trips. I rarely see much better thank that.

I usually budget my trips using a 12 mpg figure, to error on the side of caution. That way I usually end up with more fuel than I planned for.
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Old 10-10-2012, 02:35 PM   #105
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Quote:
Originally Posted by dkottum
The bottom line of fuel efficiency is out-of-pocket cost to get the job done, or it is meaningless. Why spend $50,000 to get a few more miles per gallon, when you can get a less fuel efficient but capable tow vehicle for $25,000?

This is the question is asked myself when I compared a VW Touareg TDI with a Dodge Ram Express 5.7 gas, and bought the Dodge.

There are many similar examples. Fuel efficiency can be very expensive.

doug k
I didn't buy for fuel efficiency, just diesel power (and hopefully a more reliable diesel from Ford). The somewhat unexpected amount of fuel efficiency from this vehicle is an added benefit I thought I would share for others in the market for a TV. (btw my 250 is a supercab short bed; 142" wheelbase)
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Old 10-10-2012, 11:21 PM   #106
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Originally Posted by TouringDan

Ahab

That is outstanding fuel economy, even with the planets all properly aligned, but I doubt that it is the record. I am waiting for a VW diesel to chime in towing a lightweight vintage Airstream.

Dan
Ha ha...I've got the lightweight vintage AS and the twin to the Touareg--a Porsche Cayenne Turbo. It's far from a diesel though and at $4/gal for Super I don't even want to know the "cpm" calculation. ;-) I must say though that `10-11 mpg at a consistent 70mph from Colorado to Arizona was a pleasant surprise considering the 16-17mpg I usually get unloaded at much faster speeds.
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Old 10-10-2012, 11:24 PM   #107
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6.7 L Dodge Cummings Diesel: 14 mpg while towing

19-21 on freeway when not.
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Old 10-10-2012, 11:38 PM   #108
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Originally Posted by Budget M3

Ha ha...I've got the lightweight vintage AS and the twin to the Touareg--a Porsche Cayenne Turbo. It's far from a diesel though and at $4/gal for Super I don't even want to know the "cpm" calculation. ;-) I must say though that `10-11 mpg at a consistent 70mph from Colorado to Arizona was a pleasant surprise considering the 16-17mpg I usually get unloaded at much faster speeds.
Oh, and the P-truck is 6 years old and cost much less than ANY newer TV. Factoring in the (lack of) depreciation and cheaper insurance for a 6 year old vehicle, I'd guess I am probably running the equivalent of somewhere around 20cpm. Not as good as many here, but I am having just as much (or more?) fun!
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Old 10-11-2012, 10:17 AM   #109
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The bottom line of fuel efficiency is out-of-pocket cost to get the job done, or it is meaningless. Why spend $50,000 to get a few more miles per gallon, when you can get a less fuel efficient but capable tow vehicle for $25,000?

This is the question is asked myself when I compared a VW Touareg TDI with a Dodge Ram Express 5.7 gas, and bought the Dodge.

There are many similar examples. Fuel efficiency can be very expensive.

doug k
Doug,
You compared an apple with an orange - those two vehicles couldn't be more different. Selecting a vehicle, particularly if towing is not your sole or even primary usage, involves many more factors than mpg. Enjoy your Dodge - I really enjoy my Jeep CRD. Different tastes.
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Old 10-11-2012, 12:08 PM   #110
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Doug,
You compared an apple with an orange - those two vehicles couldn't be more different. Selecting a vehicle, particularly if towing is not your sole or even primary usage, involves many more factors than mpg. Enjoy your Dodge - I really enjoy my Jeep CRD. Different tastes.
For the purpose of tow vehicle and easy daily driver at destination, the Dodge Ram and VW Touareg TDI are quite similar, at least for us. Both have adequate power and rated towing capability, both are relatively short wheelbase for getting around town, both drive and ride comfortably.

The difference and deciding factor is in fuel use/cost which is not huge, and initial price, tax, license, insurance and maintenance costs, as well as money either tied up or paying interest. It's a guess what the difference will be over the long run, but we found the Dodge Ram Express fully equipped for towing and nicely outfitted a great bargain.

We keep a VW Jetta TDI at home for use without the trailer. The Touareg TDI can't come close to that in fuel use or cost of ownership either. The Dodge and the Jetta together cost less than the Touareg, all bought new.

So whether apple or orange, they are both good, but one costs much, much more to do the same job.

doug k
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Old 10-11-2012, 01:39 PM   #111
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I just completed a 5,000 mile trip to Yellowstone and back. Even with the kayak on the roof I averaged 17.2 mpg towing (calculated). I kept my speed at 66 mph. My previous F-150 couldn't even get that EMPTY.

The highest I've seen with a tailwind was 19.1 mpg and the lowest going into a strong headwind was 14.2 mpg. I've towed about 12,000 miles this year and couldn't be more pleased with the Touareg TDI.

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Old 10-11-2012, 02:33 PM   #112
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Yes Steve, small diesel is probably the future of towing. I wish VW or others would produce a lower priced utility version instead the fancy models for us that just want a tow truck.

doug k
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