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Old 02-05-2012, 08:46 AM   #21
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"I have used E85, I lose about a few 10ths of a mile per gallon."
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Are you sure that is all you lose in fuel mileage? I thought E85 had a lot less energy/gallon, thus the mileage would be considerably worse.
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Old 02-05-2012, 08:59 AM   #22
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( E85 ) Pulling the trailer I lose 10ths of a mile. With out the trailer I lose about 1.4 mpg. ????
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Old 02-05-2012, 09:17 AM   #23
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When I drive slower then around 67, my truck is kind of below the power range. It likes to tow in the 67-70 range. Mileage doesn't vary much between 9.8 - 10.2.
Without the 5th wheel, cruising on the highway, sometimes as high as 18. Computer right now says 14.5, which is pretty much in town driving.
2008 F250 Turbo Diesel with 37' SATS.
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Old 02-05-2012, 10:09 AM   #24
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60-65 for me -- must pay more attention to the road

most all say 50-55 MPH best for mileage
but
it is really hard for most to drive 50-55
and if on a two lane mountain highway
such as we drive much to the desert
the ones behind that wish to get by
get pretty darn uptight at times

that is about the time in which
I pull over and let them pass

that is what it is all about
and I need to remember
slow down and enjoy the sights

traveling over 60-65 for me
means that I have to pay more attention
to the road
and less on the nice sights to see

Mountainman
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Old 02-05-2012, 11:22 AM   #25
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Drive around 61-62 mph and average 10-13 mpg depending upon the wind and road conditions with the Durmax.
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Old 02-05-2012, 02:08 PM   #26
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I have to compute my towing mph by hand. I dropped the ball on this when I brought the truck - just assumed my truck had it since the other truck I test drove did.

I usually fill up the night before and then after unhitching at the cg will fill up again right away so I can check on mileage.

As for a previous comment about suggesting to trade for a Dodge - well as nice as the Dodge trucks are I really like my Toyota Tundra. I know for a fact that it can take a beating when involved in a rear end accident on the freeway (slower speed) and all of the impact is on my hitch but that's a different topic.
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Old 02-05-2012, 03:46 PM   #27
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Since I tow with one of those fuel thisty Ford 6.4 diesels and only get 10 mpg empty, I get as close as I can to a tractor trailer, have the wife hang out on the running board, and when I get close enough she throws a BIG hook at it. Gotta save fuel somehow!!! Let them big boys pull me along. Truck doesn't care what it carries, 10 empty, 9 towing a Thunderbolt fiver. Fuel additive makes no difference either. Truck also cares squat about how fast I go. Best I ever got towing was 10.1, worst 7.7. Only thing that seems to affect it is type of fuel I put in.
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Old 02-05-2012, 03:55 PM   #28
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I can't believe you only get 10 empty. My 6.4L was getting close to 16mpg empty. With the 5er it was a different story. Like you, just a little over 10mpg was the best I got, probably averaged about 9mpg, maybe a little less. I haven't towed enough with the new one yet to see...I can't wait.
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Old 02-05-2012, 04:25 PM   #29
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Quote:
Originally Posted by EdJunior View Post
I can't believe you only get 10 empty. My 6.4L was getting close to 16mpg empty. With the 5er it was a different story. Like you, just a little over 10mpg was the best I got, probably averaged about 9mpg, maybe a little less. I haven't towed enough with the new one yet to see...I can't wait.
Ouch 10 mpg mt! With diesel running around the $4.35 per gal around here. Thats ugly. The 08 Duramax got around 16 to 18 mt, if i kept my foot out of it. The 11 not so good yet but its only got 5000k on it. If its anything like the 08 it will get better.
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Old 02-05-2012, 05:06 PM   #30
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Just got back from a trip, extremely windy on way out 65 mph average 6.9 mpg (ouch!), no wind on way back same mph 10.2 mpg. So only drive on calm days!
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