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Old 01-01-2013, 09:40 PM   #1
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trying to decide between gas and diesel, short or medium

looking for best fuel mileage either in gas or diesel in a short bus or a medium bus. Best engine size and rear axle gears or two speed. Trying to figure this out for long trips across country. I'm hoping this is the place to get the best info.
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Old 01-01-2013, 11:49 PM   #2
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Re: trying to decide between gas and diesel, short or medium

Diesel is the only way to go for fuel economy.
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Old 01-02-2013, 08:56 AM   #3
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Re: trying to decide between gas and diesel, short or medium

diesel is best in many applications. i also add 2 cycle oil and centane booster...
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Old 01-02-2013, 12:16 PM   #4
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Re: trying to decide between gas and diesel, short or medium

Once again...Diesel. No comparison for longevity (up to a million miles)...mpg (you can squeeze 30 out of a Cummins 4BT even in a small RV)...and low maintenance. They still have to be cared for, but nothing like a gasser. The real trick to mpg is final gearing matched to driving style. For long range highway cruising you want a combination of tranny, rear end and tire size that will keep the engine in its' "sweet spot". In my particular case, that is 1800 rpm's at 65mph but you will have to run some numbers to get it right for any other rig.

Take a look at the site below. It is a calculator for doing just that.



http://www.csgnetwork.com/multirpmcalc.html

Happy hunting & welcome to Skoolies!
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Old 01-02-2013, 12:27 PM   #5
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Re: trying to decide between gas and diesel, short or medium

Make that X3---or is it 4 now? I cant remember As Tango says, you have to find the sweet spot for your particular rig. Jack
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Old 01-02-2013, 04:48 PM   #6
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Re: trying to decide between gas and diesel, short or medium

I think the "sweet spot" for my motor (1160 CAT), is pedal to the metal. I have had it up to 72mph. The motor has not blown up. I wish I had a tachometer. When I try to go just 60 mph, it does not go up hills very strongly.

The placard says 6.8 rear end. (perhaps it has been changed before I bought the bus). I have 11R 22.5 tires.
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Old 01-02-2013, 09:55 PM   #7
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Re: trying to decide between gas and diesel, short or medium

I have to jump on the diesel band wagon... A gasser won't take the abuse, will get less mpg and **** the bed way before a diesel...
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Old 01-02-2013, 10:19 PM   #8
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Re: trying to decide between gas and diesel, short or medium

AH, I just re- read, get the longest, tallest, widest bus you can find room to park. My bus is only 22' long and while I LOVE it, its size does cramp my style and it costs no more to outfit a big bus. While I'm at it, try to find a bus someone else has taken the seats out of--that is a pita. Often by the time the seats are gone the would be bus nut will have had a change of heart and be ready to sell cheap. My two cents worth. Jack
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Old 01-02-2013, 10:28 PM   #9
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Re: trying to decide between gas and diesel, short or medium

Quote:
Originally Posted by ol trunt
AH, I just re- read, get the longest, tallest, widest bus you can find room to park. My bus is only 22' long and while I LOVE it, its size does cramp my style and it costs no more to outfit a big bus. While I'm at it, try to find a bus someone else has taken the seats out of--that is a pita. Often by the time the seats are gone the would be bus nut will have had a change of heart and be ready to sell cheap. My two cents worth. Jack

I agree, get the biggest bus you have room for... Mine is 25', but I wanted a Shorty to get into tight spots we camp at...

And the seat thing is spot on... They can be a pain to remove and get rid of...

I would be most concerned about over all condition, how it runs, tires, glass that you want to leave in, lights/lenses, wiring, brakes... You can spend a lot of money just doing maintenance that has be neglected...
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Old 01-02-2013, 11:13 PM   #10
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Re: trying to decide between gas and diesel, short or medium

Well, I think my "handle" speaks for itself: Diesel all the way bro!
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