View Poll Results: What kind of mileage do you get?
3-5 with Gas 11 3.47%
5-7 with Gas 35 11.04%
7-10 with Gas 31 9.78%
10+ with Gas 11 3.47%
3-5 with Diesel 0 0%
5-7 with Diesel 20 6.31%
7-10 with Diesel 113 35.65%
10+ with Diesel 96 30.28%
Voters: 317. You may not vote on this poll

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Old 03-12-2007, 07:18 PM   #31
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Cubic footage per mile I've never heard that before, but it makes sense. I think trains that get 20 gallons to the mile (yes, gallons to the mile) win. Last I heard it took 1 gallon of fuel to move 1 ton of freight about 400 miles.
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Old 03-25-2007, 10:37 AM   #32
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Big Gary: 30 ft, 54 passenger International S1800 Thomas Built Bus

Engine: 9.0L Diesel
Trans: AT545 Allison 4 SPD Automatic
Rear: Spicer 6.50 ratio

Fuel MPG:
High: 13.41 mpg
Low: 4.04 mpg
Avg: 7.47 mpg

Example:

Las Vegas, NV......Starting point
Boron, NV............183.5 miles....28.402 gallons....6.46 mpg
Bakersfield, CA....113.7 miles....15.720 gallons....7.23 mpg
Madera, CA..........121.8 miles....15.898 gallons....7.66 mpg
Willows, CA..........226.6 miles....23.578 gallons....9.61 mpg
Redding, CA..........71.9 miles....17.800 gallons....4.04 mpg Tough hills and mountain climb
Eureka, CA..........162.2 miles....15.133 gallons....10.72 mpg
Shingletown, CA...176.0 miles....33.975 gallons....5.18 mpg
Reno, NV.............174.3 miles....13.001 gallons....13.41 mpg Very flat out running
Rye Patch, NV......112.2 miles....14.870 gallons....7.55 mpg
Carlin, NV............152.2 miles....29.790 gallons....5.11 mpg
Wells, NV..............72.7 miles....14.290 gallons....5.09 mpg
Lakepoint, UT.......157.4 miles....17.986 gallons....8.75 mpg
Evanston, WY.......105.8 miles....17.865 gallons....5.92 mpg
Rawlings, WY........208.6 miles....25.658 gallons....8.13 mpg
Larkspur, CO........283.4 miles....39.301 gallons....7.21 mpg
Pueblo, CO.............66.3 miles end of trip

As you can see the mileage per gallon varies quite a bit dependent upon the terrain. Also consider the configuration of your rig. One of the reasons I want to change out my rear end gearing is to improve highway speeds and gas mileage, but in doing so I will loose some climbing muscle for tackling hills and mountains. Such is life.

I hope this helps
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Old 03-25-2007, 07:54 PM   #33
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That's a cool list! It's tough to get accurate numbers in a single tank just because the diesel fuel foams so much.

It's interesting that your mileage varies so much. Mine varies by maybe 2 mpg total. The worst tank I've seen is about 6.5 mpg and the best was ovre 8, but 8 mpg is a pretty solid figure to bank on for me.
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Old 03-25-2007, 08:18 PM   #34
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This trip covers a lot of various terrain, from flat cross country driving to gradual climbing to city, to step hard climbs pulling serious grades and some pretty tough combinations of all of the above. The best mileage of course was on the long level steady flats, hills and mountains are the worse. But it's important to realize that you can have a lot of variation.

I'm hoping with a new set of gears in the rear end I can improve both the speed and gas mileage.
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Old 03-25-2007, 08:45 PM   #35
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My worst mileage was across North Dakota which happens to be as flat as any state I've ever seen. It doesn't matter which direction you're traveling in across North Dakota....you will ALWAYS have a 25 mph headwind.
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Old 03-26-2007, 09:11 AM   #36
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Sounds kinda like the story your grandparents told you about having to walk to school, barefoot, in the snow, uphill, both ways! :P
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Old 08-08-2007, 10:02 PM   #37
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Re: What kind of milleage do you get?

Okay, just took a long trip (5,326 miles) so I think I have a good idea what my mpg (or lack therof) is.
Low: 6.3 (Redding, CA to Reno, NV)
High: 9.0 (Cheyenne, WY to North Platte, NE)
Average: 7.43
I filled up 22 times (60 gallon tank so I always stopped every 300 miles). We went from Lewisburg, TN to Reno, NV to Ferndale, CA and back. I hate driving the interstate but we had limited time so we went all interstate. On the way out I had a canoe and a small airplane fuselage strapped to the top and on the way back had the same canoe and two 2'x4'x8 boxes of foam strapped to the top. I did get asked if I was on my way to Burning Man...
My bus has an air throttle so I never had my foot all the way to the floor. Even though I kept an eye on the exhaust (it has a driver's side exit) to keep it in the "sweet spot" I don't know if it really made a difference. Level speed is 62 mph (verified by the radar speed limit signs), down a 6% hill is 65 mph and I actually hit 70 once. My slowest speed was 15 mph going up the I-80 grade outside Salt Lake City and several other times. I love the scenery at slow speeds... I got pulled over by a sheriff's deputy comeing from Susanville, CA to Reno for "impeding traffic". Didn't get a ticket since it was one lane construction and there was no place to pull off. My wife thinks they pulled us over so they could check the bus out- she overheard one of the deputys tell the dispatcher that it was a "cool bus conversion"...
With my non-turbo'd 3208 I can pretty much tell my altitude- the higher it is the more it smokes. Here in Tennessee it doesn't really smoke at all.
My favorite state was Wyoming- one of the jokes posted at the welcome center:
"When the wind stops blowing the cows fall over." The wind blew so hard it shifted the load on top about 8" to one side.
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Old 10-03-2007, 04:06 PM   #38
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Re: What kind of milleage do you get?

Now I have only drivin my bus from Wisconsin to Georgia. But on the ride I averaged around 11mpg. It was a hoot to drive too.
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Old 03-09-2008, 12:58 PM   #39
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Re: What kind of milleage do you get?

New kid on the block, having just found this website.....and I must say, Thank God, 'cause I've been a-lookin' for a looooong time!

Recently purchased a 1989 Chevy 72 (?) passenger Blue Bird, ripped out the seats and did the conversion myself. ((Pictures coming soon)).
I had expectations of 5mpg (or worse) with the 366 ci motor and auto tranny, so on our first trip, I kept the speed around 55-60 mph. I approached the gas pump with an open mind, but was ecstatic to find I had averaged 8.8 mpg. I don't have a tach (yet) so I don't know what rpm it turns at that speed, but it sounds fairly high, maybe 3300 or so? I do know that a couple of times (downhill) I hit 65-70, and it sounded as though pistons and valves were about to leave their respective places within the motor, so I kept it under 60mph from them on. The second fill-up was only 8.5, but most of that was in the Ozark mountains of Arkansas, and it's tough to get above 40-45 mph on those windy roads.

Has anyone successfully replaced their rear-end with a higher gear ratio, and at least maintained their mpg? I would love to be able to cruise at 60-65 mph, and not have the motor turn near red-line like that. I would think it would last much longer.
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Old 04-01-2008, 12:30 AM   #40
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Re: What kind of milleage do you get?

I'm at 11-12 miles a gallon.
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