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Old 09-23-2013, 06:32 PM   #1
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Mileage.....

Well, I've put 8K miles on my Berky since Memorial Day. From Phoenix to Denver, out to Elkhart and then up to Glacier NP. Then on to Seattle and from there south to San Francisco. Finally out to Elko, NV and the down to Las Vegas which is probably going to be my "wintering location"

In this rather extended trip, I've averaged just over 11 MPG. I've seen it as high as 12.5 and as low as 9.5 but overall I'm right at 11 to 11.2. At one point I actually saw 13.2 but think I may have had a pretty good tail wind, so I'm not counting that segment.

Yesterday, coming from Elko, NV to Las Vegas, NV (440 miles) I averaged 12.1

All in all, pretty good for a "big old coach".

Boowho??
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Old 09-23-2013, 06:35 PM   #2
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Boo,
That IS pretty good mileage. Which engine do you have - the 340 or 360?
Tom
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Old 09-23-2013, 06:56 PM   #3
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Boo,
That IS pretty good mileage. Which engine do you have - the 340 or 360?
Tom

340 Tom.....

But I forgot to mention that I rarely drive over 60 and usually right around 58. I always say I have nowhere (in particular) to go and the rest of my life to get there!!!

Drag goes up exponentially with speed increases, so the difference between the high 50's and mid 60's MPH (or even faster for some) can be dramatic.

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Old 09-23-2013, 07:02 PM   #4
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Boo,
I guess you are right because I usually drive around 65 and my mileage is not as good as yours. Guess I will need to slow down some.
Thanks,
Tom
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Old 09-23-2013, 07:07 PM   #5
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Hey, as they say...'Your mileage may vary'
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Old 09-23-2013, 07:26 PM   #6
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I made about 10.3 in a little over 4000 miles, towing a CRV, and using about 30 hours of generator. I know of no other class A diesels that even come close. Most of my friends average 7.5.
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Old 09-23-2013, 07:50 PM   #7
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On our trip to Arkansas I averaged 10.2 mpg.


On the steeper downhill runs I was getting 75 mpg lol
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Old 09-23-2013, 07:58 PM   #8
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just curious, but most coaches seem to be in the 300 hp or so range. do they make an option for a larger hp engine? not in any kind of market for one, was just curious. to my way of thinking its more horses, less work, better economy.
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Old 09-23-2013, 09:11 PM   #9
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Boo,
I guess you are right because I usually drive around 65 and my mileage is not as good as yours. Guess I will need to slow down some.
Thanks,
Tom

Tom.....

It WILL make a difference. Whether it's enough of a difference to make it worthwhile would be up to each and every coach owner, based upon their own personal needs/preferences.

I found something interesting as I was tracking all this over the last few months.

If rolling along on the flat land for say 50 miles and getting 11 MPG, starting up a hill a mile or two long, the MPG might drop a tenth or two.

BUT to regain those lost tenths of a mile (back to 11 MPG) when back on level ground could take as long as 10 or 20 miles.

In other words, the negative effects of an increase in engine load are felt sooner/more dramatically than the positive effects of a decrease in engine load. Or so it seems to me.

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Old 09-24-2013, 12:34 PM   #10
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I've been getting about the same mileage on my 2013 Berkshire on our 7500 miles summer trip away from Texas. (a little less thru the Rockies) but great from Yellowstone back to Houston. I was told on the 6 speed Allison that 5th and 6th were both overdrive. We found you had to go up to about 65 to get it to drop into 6th but then could back off to about 61-62 with cruise control and it would stay in 6th.
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