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Old 08-31-2012, 12:37 AM   #15
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One thing that's easy to forget is that it was built when the speed limit was 55 MPH. It's geared for that, or thereabouts, and trying to keep up with the Jones will, as always, break you.

However, check with some of the people one the mechanical forums. They are very, very good, and if your engine has a lot of torque left over you might be able to change some of the gearing.

I have a 19' Intervec Falcon with a Ford 351W and they explained that little motor was doing about all it could - there was no reserve to mess with gear ratios. But you may have some.
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Old 08-31-2012, 03:10 PM   #16
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Just now I have a small engine problem so it SUCKS and I mean SUCKS gas out of the old tank (See, Not being vulgar, just descriptive).

7 MPG on the rig you have sounds reasonable

Try for 8 by washing and waxing,, Yes, it can make that much difference, perhaps more

I wash and wax mine in 1.5 weeks.
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Old 09-03-2012, 01:14 PM   #17
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It seem pretty bad. were new at this we just bought our first 24 foot rv ford 460. just wondering what to expect
Yep, that's about right. I get anywhere from 6-8 depending on my speed in my 87 carb'd 460.
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Old 09-03-2012, 05:22 PM   #18
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We average between 7 and 8 on our 81 Class C driving under 60mph with a 350 Chevy and carburetor.
It's usually closer to 7 than it is to 8, so It sounds like you're about right.
Terrain and road speed seem to be the factors that determine the fuel mileage in these beasts.
Honestly, I hardly even check it anymore, it's been consistently getting 7 mpg for the 3 years we've owned it with varied driving conditions and techniques. I have accepted that it's the best I'm ever going to get with it.
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Old 09-03-2012, 05:58 PM   #19
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I'm towing and carry quite a gear load, and I just got 6.3 going through western Montana, Idaho and Washington. I'd be happy with 7!
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Old 09-03-2012, 06:08 PM   #20
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It seem pretty bad. were new at this we just bought our first 24 foot rv ford 460. just wondering what to expect
Nobody said it was cheap. Add up your fuel costs + CG fees and compare that to Hotel + Resturant Meals + Fuel for the car. Pretty close to the same thing BUT, you can park where you want. Welcome to RV'ing. There is a price attached to everything.
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Old 09-03-2012, 06:19 PM   #21
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I think around 7MPG. is about par for any motorhome,When someone tells me he's getting 10-11, I suspect he's embelishing,or checking his mileage east bound from Albuquerque to Okie City.( That means downhill with a tailwind,)
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Old 09-03-2012, 09:48 PM   #22
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[QUOTE=dennis45

Welcome to RV'ing. There is a price attached to everything.[/QUOTE]

Yes, indeed. This is true. But it is so cool to do it your own way and at your own pace! It has been worth every penny!
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Old 09-03-2012, 10:11 PM   #23
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You're thinking about it all wrong.

Amazing fuel mileage!

7 MPG is not bad mileage for a house.
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Old 09-03-2012, 10:27 PM   #24
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We're currently on the road getting at best 6mpg, but we had mountains. 55mph
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Old 09-03-2012, 10:28 PM   #25
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We have an 1984 27' Winnebago Chieftain with a Chevy 454. When we first got it, it had sat for a while and we would get around 5.5-6mpg. Quite a few trips, many tanks of gas with a high amount of fuel system cleaner and a tune up later and we average 9mpg highway and about 7.5mpg city. We do more highway driving, our overall average mileage is around 8.25mpg.
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