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Old 05-13-2014, 04:18 PM   #11
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I get 10 mpg towing and 11-14 empty. 10 mpg is almost a universal average with aerodynamics being the limiting factor rather than rolling weight and length.

I have heard of some marginal tow vehicles were their empty/towing mileage drops by 50%. If that is the case, your engine is very stressed and is working too hard.

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Old 05-22-2014, 03:00 PM   #12
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Towed a Cub 160 with a both Honda minivan and Chev 5.3 1/2 ton, between 9-11 MPG regardless of the tow vehicle.

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Old 05-22-2014, 03:11 PM   #13
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ScottyStang....you never mentioned what your "real-life" MPG is...my friend gets about 20MPG (on a good day) with his Cx-6. That said, you're probably in the average MPG drop for towing near capacity.

I get almost 30MPG hwy....and about 17MPG towing. I use 93 when towing (actually, 93 is recommended at all times with my TV).
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Old 05-23-2014, 06:44 AM   #14
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You said you averaged 60 mph.. this means to me that you were driving much faster than 60-65 at times... every 10 over 60 reduces your mileage by about 10%.. Did you know also that ST tires are only rated to 65 mph?
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Old 05-25-2014, 05:32 PM   #15
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Originally Posted by scottystang View Post
Thanks, everyone! Would trying 93 octane gas make a difference? Currently we only use 87
I don't recommend going with 93 or higher if the manufacturer doesn't suggest you use it. Factory tuning is based on factory recommended octane. It may make your mileage worse and even create more emissions. The best advice I've received pertaining to mpg/litres per 100 when towing is don't look at it. You won't like the numbers. If you don't like the numbers trade in your TT for a Prius.
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Old 05-26-2014, 09:06 PM   #16
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Just got back from a one day trip locally with 2010 mazda cx9 and jayco x17a. So, essentially the same as what you have. I kept it at 55-60 on highway and less on the windey roads. Average around 10 mpg also.

But we had a lot of fun!

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Old 05-27-2014, 05:28 PM   #17
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Back from Memorial Day camping trip in Maine. Got 10.6 MPG on the way up, 11 MPG on the way home, never going above 60 MPH. I averaged between 55-60 MPH. The X17Z tracked great and I'm happy with how the Mazda CX-9 performed. I'm already used to the mileage and I just chalk it up to the lifestyle of trailering. The "normal" mileage is only 17 MPG or so on mixed driving, so 10-11 MPG seems reasonable.
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Old 05-27-2014, 06:26 PM   #18
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I just took out my 17z out this weekend for the first time.

~100mile roundtrip, and averaged 10.3mpg. Drove 55-60mph most of the way.
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Old 05-27-2014, 06:35 PM   #19
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First trip with our 2008 X17C behind our Jeep Grand Cherokee. 9 to 10 mpg running between 55 and 60 on state roads and the interstate.
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Old 05-27-2014, 06:36 PM   #20
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I have the X19H. I was getting between 10-11 mpg towing it home from the dealer and on the first trip. This past weekend I got about 13. The only difference is I had the canoe on my racks on top of the truck. Not sure if that helped cut the wind or if I just had a tail-wind the whole time.

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