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Old 05-23-2013, 08:19 AM   #11
Join Date: Mar 2013
Posts: 42
I got 40x12. Gross weight is 18000. I pull it with 2011 F350 dually. 6.7 diesel. 70-75 mph around 9 mpg. Can't tell about slower. Don't go slower.

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Old 05-27-2013, 04:55 PM   #12
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Join Date: Nov 2012
Posts: 17
Originally Posted by melk-man View Post
gonna go out on a limb, and there is a chance i'm wrong, but 8mpg with that vehicle and toy hauler is VERY optimistic.

I have way over 100k miles towing a 24x8.5 race trailer that weighs about the same as my 2013 xlr27hfs.. but the xlr is taller. I have a 2005 diesel excursion in great shape. i tow all over the flat as a pancake state of Florida (almost zero hills/incline). I RARELY ever go above 70 mph in the interstate. the best i do is 11mpG on the highway. If i have to drive around the city a bunch with the trailer, it's worse. With the xlr27hfs?? it goes down to 10mpg unless i back er down to 65mph.

I had a lincoln navigator years back pulling a 7x16 dual axle trailer (weighed way less than a xlr27hfs ) .. i got SIX-SEVEN mpg with that thing even at 65-70mph .. LOL !

I would take some more readings towing the xlr in your Dinali but be sure you reset the thing from any driving prior to towing.. or better yet, be sure your speedometer is correct, and do the math the next time you fill up
That's what I got the when towing it home from Michigan and when towing it to a race from Ohio to Ky over the winter. It seemed to average 7.6-8 mpg each time I towed.

I was not running the air conditioner, which I'm sure will make a difference, and I also was not going over 60-65 mph.

I'll get some better readings over the next few weeks and post an update. Anytime I tow anything at all I reset the fuel MPG to see what I get. I'll take 7.5-8 mpg any day, so hopefully it stays there.

Also, the dealer asked what I get everyday driving and I told him around 15mpg... to which he replied, well, you can count on getting half of that towing this thing. Thus far, it looks as though he was right on the money. And, he was towing a large race trailer with a 2007 Yukon Denali as well.

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Old 05-28-2013, 11:42 AM   #13
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Join Date: Mar 2013
Location: tampa
Posts: 126
i could see that mpg driving 60-65mph. that i suspect is realistic. I see a significant difference as you get closer to 70mph and above. mpg starts to drop even with my diesel.
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Old 06-01-2013, 10:23 AM   #14
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Join Date: Jan 2013
Location: Central Ohio
Posts: 74
60 mph 9 mpg, 12000 lbs in the 305v12. 65-70mph 8 mpg. Circleville Ohio to Buccaneer State Park in Waveland Ms

2014 Forest River
XLR Viper
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