80 mph, mpg??
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From: herriman utah
80 mph, mpg??
in utah, most of the interstates are wide open with at least 75 mph speed limits. I am wondering what the new 6.7's are getting going 80 mph on level ground, anyone got an idea??
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From: Corinth, TX
honestly, I've actually started driving a bit slower with this truck. at 65-70 I can get 20-ish mpg on my somewhat hilly commute (about 2/3 of it is 70mph limit with 1/3 at 60mph). that means moving from the fast lane to the slow lane, but it only adds a few minutes to my drive and stands to save me about 8 gallons per month. $20-25 per month savings is nothing to shake a stick at 
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From: Fallon,NV
As far as the Cummins only getting 14.5mpg, I'm shocked by that. My uncle swears that his 06 Megacab gets 21-23mpg even at 75-80mph! It had me considering going to a Cummins just for the mileage. But all along, I figured that he was lying just to make his truck sound more impressive than mine.
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I, too, have slowed up a little. I like the better mileage. The few times I have ran 80 it looks like 18 mpg or so. At 70 it does 20 or more. No traffic tickets either.
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More Turbo
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With a 450 its not so pretty. The short trip I took my mileage went down to 10.5 mpg doing about 80-ish.
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From: herriman utah
That's pretty impressive mileage for that speed considering the amount of drag that these trucks have. I'm just curious what the same truck with 3.31's would get at that same speed?
As far as the Cummins only getting 14.5mpg, I'm shocked by that. My uncle swears that his 06 Megacab gets 21-23mpg even at 75-80mph! It had me considering going to a Cummins just for the mileage. But all along, I figured that he was lying just to make his truck sound more impressive than mine.
As far as the Cummins only getting 14.5mpg, I'm shocked by that. My uncle swears that his 06 Megacab gets 21-23mpg even at 75-80mph! It had me considering going to a Cummins just for the mileage. But all along, I figured that he was lying just to make his truck sound more impressive than mine.
my dad had an early '04 dodge specd just like my truck but those years has less emissions controls, I drove it on about a 200+ mile trip and IMO it would get about 10% better mileage than my '06 would have gotten. but still that was only about 16 mpg on the highway. the point I am making is I call BS on the mileage claims over 20 mpg, on any diesel except maybe the old trucks, I think you need to be averaging about 60 mph to get that kind of mileage and around here we just don't drive that slow. oh well I guess I will see in a couple weeks when my 2011 6.7 arrivers
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