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Old 04-07-2011, 06:05 AM   #1
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Jayco V-10 gas mileage

we took our first big trip yesterday to Memphis and got 4-5 mpg. This is a 2010 31FK with now 1800 miles on it. So when does it improve? I was expecting about 7-8 mpg. towing a Hyundai.
Gary
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Old 04-07-2011, 06:42 AM   #2
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Soon I hope, wow-the semi trucks I have driven pulling a load, got at least that for mpg.
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Old 04-07-2011, 06:48 AM   #3
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I have an '08 Jayco Melbourne, same engine, towing a Honda CR V and get over 9 mpg, but I drive about 60 mph. Anything over that, and mileage decreases significantly.
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Old 04-07-2011, 06:54 AM   #4
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How fast were you driving? Big difference between 60-62 and 70-75. Remember your pushing a vehicle down the road with the profile of a house.

It would be interesting to have an engineer figure out the estimated difference in the resistance between 60 and 70 mph on a level road. Any engineers out there??
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Old 04-07-2011, 06:56 AM   #5
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My first tank fill-up gave me 15 mpg, the second 4mpg.
After I learned how to fill (top-off) I got it steady....

Gerard.
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Old 04-07-2011, 08:57 AM   #6
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gas mileage

guess i'll slow down some.
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Old 04-07-2011, 08:58 AM   #7
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top off

Quote:
Originally Posted by pa0gri View Post
My first tank fill-up gave me 15 mpg, the second 4mpg.
After I learned how to fill (top-off) I got it steady....

Gerard.
=
so what did you do different?
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Old 04-07-2011, 10:58 AM   #8
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With your size of a coach cruising between 58 & 62 you should get between 8 to 10+mpg. Our coach with the v10, the mpg improved by a couple of mpg after approximately 8k miles. Overall average since new has been around 7pmg and I'm OK with that considering it's a 38' coach weighing 21,230lbs towing a 3,200lb vehicle.

Good luck and safe travels
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Old 04-07-2011, 11:30 AM   #9
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Running the generator will drop your MPG also. Getting same fill up each time in RV's I think is harder then a car. 55 MPH will greatley improve MPG also. I know that is slow and seems to take forever to get were you are going.
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Old 04-07-2011, 11:41 AM   #10
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Moving a house on wheels down the highway equals $$$$. If you opt to do this you should really not be worried about mileage. Then that said....SLOW DOWN! Mileage really improves the slower you move. My speed is normally 60-64. I have been pasted many times by folks pushing their house on wheels at regular car speeds of 70/75 and I often wonder what in the world would they do if a tire blew or a gust of wind hit them. But really I have never seen a Motorhome pushed over or sitting along the road with a blown tire so I guess they are moving fast and not worrying about gas prices and miles/gallon!
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Old 04-07-2011, 07:38 PM   #11
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You start pushing up over 65 to 70 mph, the fuel economy will DROP. Keep at a max of 65 mph.

Ken
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Old 04-07-2011, 07:51 PM   #12
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First tank 13.8MPG, flat highway and not pulling anything. Coachmen, 2011 Concord 300TS, with V10, 6.8. Driving 60 to 62MPH. Fast enough to get me where I'm going. I retired to take my time and enjoy life, so why go any faster.
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Old 04-08-2011, 11:06 AM   #13
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We have a 32' Coachmen Class C with the V-10. Average highway speed 70-75 will net me around 7 to 7 1/2 mpg.
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Old 04-10-2011, 07:39 AM   #14
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gas mileage

on the return trip doing 60 (by speedometer) and 58 (by GPS) got 8.5 to 9 mpg. better and takes a little longer. no hard accelerating and RPM's were low (2200 to 2600). was a flat road and low wind.
the 65 to 70 mph posts with reasonable results really seem surprising. Flat--no wind?
*
so what's the key to this?
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