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Old 10-07-2014, 06:46 AM   #11
adaigle's Avatar
Join Date: Oct 2011
Location: Smithtown
Posts: 67
The difference between 55 and 65 mph is 15% more fuel consumption. My 2015 Greyhawk is getting 8.25 miles per gallon(US).


2015 Jayco Greyhawk 31 DS
2009 Jeep Wrangler X
2012 Jayco Skylark (SOLD)
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Old 10-11-2014, 08:30 AM   #12
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Join Date: Jul 2014
Location: Fuquay-Varina
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Originally Posted by NC Roamer View Post
I realize this thread is several months old, but we didn't have our Greyhawk when it was active. Just returned from our second trip from Raleigh to Atlantic Beach, NC and back. Our 2014 Greyhawk 31FK averaged 8.3 mpg, we were not pulling anything, it was very flat terrain, and I never exceeded 60 mph. Hopefully this will improve slightly when the Ford V10 breaks in. It has only 1300 miles on it now.

Just adding this note in case a future searcher encounters this thread.
Taking our first long trip yesterday I checked the gas mileage between Morganton, NC and Cookeville, TN. We were cruising on I-40 between 55-60 mph and got 9.05 mpg. I was very pleased as the cargo bin was loaded and we had a full water tank, but we were not towing anything. This route also included passing through the Blue Ridge mountains on very hilly terrain.


2014 Greyhawk 31FK
2007 Honda Shadow Sabre 1100cc
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Old 10-31-2014, 05:47 PM   #13
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Location: Moses Lake
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I agree with most of the above. '12 Greyhawk 3100 SS. track every tankful. Max 9 min 6 mpg, overall average 7.8. doesn't appear to vary much if towing, which I mostly do. Travel against a headwind has more effect than towing. And keep the speed down. 55 is a good speed. After all part of the enjoyment is in the journey, not just the destination.

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