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  #25  
Old 04-01-2014, 10:20 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.
When I'm towing my travel trailer with my Highlander, I get better mpg in the mountains than in the flatlands. The main reason is that mountain roads are curvy and steep, so I'm driving slower.

I'm afraid I won't be driving so slowly with a big engine, though. All that power.... ...so there goes the fuel economy.
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Old 04-02-2014, 06:38 PM
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Re: Towing MPG's

Very limited experience and mileage here, with my new JGC...

With a U-Haul auto transport trailer (link; 2,200 lbs empty), and towing a 2,000-lb car and then also a 3,200-lb car (4,200 & 5,400 lb total weight), on the freeway while watching my lead foot and also locking the transmission in 8th as much as possible, I was able to get 23-25 MPG in the rolling hills of I-280 between San Jose and Redwood City, CA. That's close to sea level, about 500-1,000' ASL.

Of course, if I keep it in Drive or Sport and drive aggressively, the MPGs drop to the low teens.

The car is brand new and I drove less than 200 miles in the area while towing, so like I said, there's limited experience and mileage for this data.
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Old 04-03-2014, 11:00 AM
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I'm doing 500 miles of interstate next weekend with a golf cart (lifted and heavier then normal with big roof) on my open trailer. This sits way higher then the truck so it's a big wind drag. Can't wait to see the mpg!
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Old 04-03-2014, 11:08 AM
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Re: Towing MPG's

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Originally Posted by amr40509 View Post
I'm doing 500 miles of interstate next weekend with a golf cart (lifted and heavier then normal with big roof) on my open trailer. This sits way higher then the truck so it's a big wind drag. Can't wait to see the mpg!
Please share your results after you tow. Thanks!
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  #29  
Old 04-03-2014, 09:42 PM
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Unhappy Re: Towing MPG's

2014 JGC Laredo 2WD V6 gas. Recent 1100 mile road trip California and parts of Arizona and mostly freeway miles, mpg = 28.5 (this according to in dash trip/mpg numbers). Very happy with that. Towing our new 19 ft. travel trailer at approx. 3500 lbs mpg drops to 10.7. Not happy with that. TT is tall (normal for new travel trailers I have seen) but it does have a sloped front for reduced wind resistance. I am going to pull TT wheels and check the brakes. Not fun on brand new RV but worth checking. I think I should get better towing MPG. Towing speed was 55 -65 mph on mostly uphill and and some level freeway. I would be interested to hear what MPG numbers other JGC V6 gas owners are getting when they tow.
Thank you.
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  #30  
Old 04-03-2014, 10:57 PM
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Re: Towing MPG's

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Originally Posted by jeeplaredo33 View Post
Towing our new 19 ft. travel trailer at approx. 3500 lbs mpg drops to 10.7. Not happy with that. TT is tall (normal for new travel trailers I have seen) but it does have a sloped front for reduced wind resistance. I am going to pull TT wheels and check the brakes. Not fun on brand new RV but worth checking. I think I should get better towing MPG. Towing speed was 55 -65 mph on mostly uphill and and some level freeway. I would be interested to hear what MPG numbers other JGC V6 gas owners are getting when they tow.
Thank you.
Wind resistance on a tall square RV is tough on mileage! I suspect if your brakes where dragging that far, you'd smell them...but certainly worth a check. Tire pressure on the tow vehicle and trailer should be near max also. Every bit helps.
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  #31  
Old 04-04-2014, 06:49 PM
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Re: Towing MPG's

jeeplaredo33, I tow trailers all the time and that towing mpg number (10.7) does not surprise me. It's pretty typical of any vehicle with a similar gas V6. Towing my travel trailer with my Highlander, I get 12 mpg... but the trailer is only 7' wide x 99" high x 16' long, 2700 lb.

When it comes to fuel (dis)economy with a trailer, wind resistance is everything... well, almost.
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Old 04-04-2014, 08:34 PM
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Re: Towing MPG's

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Originally Posted by Rexlion View Post
When it comes to fuel (dis)economy with a trailer, wind resistance is everything... well, almost.
A diesel engine helps tremendously. Gas engines operate outside of their efficiency curve when towing, diesels do not.
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Old 04-05-2014, 05:10 PM
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Re: Towing MPG's

2014 JGC Laredo 2WD V6. Thanks for the responses. Checked brakes on trailer and appeared OK. Checked tire pressure (tow vehicle and trailer) and all tire pressures were low on Jeep and two tires on trailer were below correct PSI so I took care of that. Also, guys at trailer dealer had weight distribution hitch too high so front of trailer was pointing up some. Not good for wind resistance. Fixed that little problem as soon as I got home. Next outing with trailer will be approx 600 miles and hopefully mpg numbers will improve.
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Old 04-14-2014, 07:22 AM
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Re: Towing MPG's

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Originally Posted by echo7tango View Post
Please share your results after you tow. Thanks!

ImageUploadedByJeepGarage1397477732.173152.jpg

I got home late last night. On the drive down I got about the same mpg - that picture is of the return trip (reset trip computer because I towed there,dropped trailer, spent a couple days not towing, and then towing home - I just wanted towing data)

Trailer was probably just under 3000lbs and had a lot of drag from a high roof on the cart sitting on it.

I couldn't feel the drag back there with the Jeep but with the same setup behind my 4.0L gas Pathfinder I could feel the wind drag big time after about 60mph.

Lexington KY to Nashville is really hilly.

For comparison my old Nissan always got 18 mpg with no trailer on this trip rather then it's usual 20-21. Towing the same trailer 2 years ago on the same route it got 13.

Here is a typical readout of how things looked cruising on a flat section.ImageUploadedByJeepGarage1397478148.912133.jpg

This was a trip to a Sporting Clays shooting event, so the truck was pretty full too. The back had a lot of gear (each flat of shot gun shells is 27lbs....and we had a bunch of them). The QuadraLift did a fantastic job of keeping things level even with lots of weight where it probably shouldn't have been. Towed like a dream.

It did drop to 7th gear on a lot of hills. 6th on some hills. I tried having it hold 8th using the paddle shifters to see if MPG would be better- using the instant MPG readout it seemed to actually do better letting it shift.


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  #35  
Old 04-15-2014, 07:51 AM
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Re: Towing MPG's

Thanks amr40509. Not bad for 70mph cruising.
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Old 04-15-2014, 08:51 AM
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What OBDII adapter are you folks using.

Looking to buy a Bluetooth OBDII adapter to use with my Acer Notebook. Interested in TIT, EGT and boost pressure information. Would appreciate any insights folks.
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