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  #13  
Old 03-04-2014, 08:15 PM
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Re: Towing MPG's

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Originally Posted by ExcursionDiesel View Post
Maybe the OP will chime in as to why he chose the Hemi the first time. He isn't considering the v6. 3k isn't heavy on flat ground but in my post I mentioned pulling an incline. At that point the drag from the incline is significant. That may or may not be the OP's situation. I just mentioned it as a comparison...and it is an accurate assessment of what a smaller engine will do when worked hard.
totally agree
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Old 03-05-2014, 10:47 AM
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Re: Towing MPG's

The boat is 3k, but when you throw in a few passengers and a bunch of gear, you're probably pushing 4k if not more. I don't think the v6 would have enough power to keep me happy which is why my last few jeeps have been v8's. Obviously, it's not an ideal time to get rid of a '13, and I didn't plan on it so soon. But we don't want to keep our car anymore and will need to get something else..

I am in Chicago so the majority of my towing is on flat ground, but I often take my boat north or south where there can be a bit of an incline..
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Old 03-05-2014, 11:44 AM
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Re: Towing MPG's

How often do you tow? How many miles do you usually travel when you start your vehicle? How much more is diesel fuel than gas in your area?

4k isn't heavy either on illinois flat land.
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Old 03-05-2014, 11:56 AM
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Re: Towing MPG's

As long as I make a more conscious effort to fill up diesel in the suburbs (where I spend a lot of time) vs the city, the gas prices are pretty much a wash. Diesel in the burbs costs the same as 87 octane in the city. I probably tow about 5,000 miles per year.
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Old 03-05-2014, 10:17 PM
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Re: Towing MPG's

On the road running 75 to 80mph I have been averaging about 28mpg with my JGC diesel. Last week I went to pick up a new (to me) 22ft center console boat with T top, the entire rig with trailer weighing in at about 5000lbs. On the 350mi. trip home running 70 to 75 I averaged 12.5mpg. I am sure that if I ran about 10mph slower that my mpg would have increased dramaticly as the boat towered above the JGC creating lots of wind resistance. Noticed also that the engine and transmission oil temps would raise to about 280 on any long inclines and then go back down as the road leveled out or declined.
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Old 03-05-2014, 10:40 PM
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Re: Towing MPG's

Tranny temp of 280* is cooking. I hope it wasn't that high! Engine temp of 280* is not so much of an issue.
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Old 03-07-2014, 11:16 PM
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Re: Towing MPG's

My 5.3L V8 Silverado got 16mpg pulling my trailer. My Limited V6 diesel gets 22mpg on the winter blend. That is 37% better fuel economy. It should be even better with the summer blend. And, the diesel has more horsepower where you want it (1600 to 3600 RPM).
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Old 03-28-2014, 01:53 PM
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Re: Towing MPG's

During a recent 400 mile tow I observed the following:

Equipment:
3.0L diesel Summit
18' aluminium flat bed with car (total weight 4,000 lbs)

Conditions:
Speed varying between 68-73 mph on cruise control
Mixed hills and flat
Steady strong wind (varying between crosswind, tail, and head)
Ambient temp of ~20F
Elevation 4600-5300' ASL

Average for the trip was 17.5 mpg

In general I have been disappointed with the fuel efficiency of my diesel.

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Old 03-29-2014, 10:53 PM
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Re: Towing MPG's

Nice backup ride you have there. Yes, one would have hoped to get 20 mpg or more with such a low trailer.
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Old 03-30-2014, 10:11 AM
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Re: Towing MPG's

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Originally Posted by Rexlion View Post
Nice backup ride you have there. Yes, one would have hoped to get 20 mpg or more with such a low trailer.
I think on flat ground he would have gotten a lot better. Even moderate elevation changes require a lot of extra energy.
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Old 03-31-2014, 05:02 PM
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Re: Towing MPG's

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Originally Posted by ExcursionDiesel View Post
I think on flat ground he would have gotten a lot better. Even moderate elevation changes require a lot of extra energy.
There's no doubt that I would have gotten better efficiency on flat ground. It also would have been better with a stiff tail wind. Or if I had driven slower. There are bunches of ways it could have been better, but I think the 400 miles I mentioned here were a realistic representation of average terrain, and with an overall loss of 600' of elevation.

My comment about being disappointed in the fuel efficiency wasn't just in relation to towing performance. Around town (mix of city and highway) I only get 17-18 mpg.
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Old 03-31-2014, 05:17 PM
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Re: Towing MPG's

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Originally Posted by evenflow View Post
My comment about being disappointed in the fuel efficiency wasn't just in relation to towing performance. Around town (mix of city and highway) I only get 17-18 mpg.
Something isn't right. I haven't seen mileage that bad no matter how I drive. Others on this forum are seeing 21-25 in town and 27 to 31 on the highway. You might need to see the dealer!
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