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Old 10-12-2012, 06:32 PM   #11
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Quote:
Originally Posted by sluggo1 View Post
An average of 27mpg? Come on! No way
He lives in Maryland, when I was there this summer the speed limit everwhere I went was 55. Mine would probably get that mpg if I only drove 55-glad I don't have to.
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Old 10-12-2012, 06:42 PM   #12
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New truck, city driving, 12 mpg is fine I think. It will improve some, but remember, city driving means 0 mpg quite often.
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Old 10-12-2012, 07:30 PM   #13
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Quote:
Originally Posted by Gingerman
Heavy foot = low milage. Put up the fuel efficiency gauge, and see the affect of your technique. My mpg had improved with some behavior modification.

Also, I put a tonneau cover on, and it had a shockingly good impact on mpg. Highway driving, I I'm getting an average of 27mpg. Your results may vary, but the covert is paying for itself pretty quick. Bigger impact on highway than surface roads, but the overall average is up by about 10%, which is as advertised.
I call
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Old 10-12-2012, 07:30 PM   #14
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Quote:
Originally Posted by Gingerman
Heavy foot = low milage. Put up the fuel efficiency gauge, and see the affect of your technique. My mpg had improved with some behavior modification.

Also, I put a tonneau cover on, and it had a shockingly good impact on mpg. Highway driving, I I'm getting an average of 27mpg. Your results may vary, but the covert is paying for itself pretty quick. Bigger impact on highway than surface roads, but the overall average is up by about 10%, which is as advertised.
I call BS.
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Old 10-12-2012, 08:04 PM   #15
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Quote:
Originally Posted by brucesears

He lives in Maryland, when I was there this summer the speed limit everwhere I went was 55. Mine would probably get that mpg if I only drove 55-glad I don't have to.
I normally avg 20-21 on the hwy but on my way home from florida I was in traffic on a 2 lane hwy stuck going about 55. I had just filled up with gas and reset the trip computer and it showed I was at 27.x mpg by the time I got to the interstate. ( about 45 miles). Lifetime avg is 17.5
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Old 10-12-2012, 08:39 PM   #16
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Quote:
Originally Posted by dodgehemi0

I call BS.
I wouldn't say that. He did say average on the hwy. I've done 26 easy doing around 58 mph on rolling 2 lane hwy.
Drops off fast when you start passing people though ;-)
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Old 10-12-2012, 08:39 PM   #17
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Mythbusters study MPG savings of various bed modifications
the Mythbusters examine the following modifications to a truck's bed to see how it affects the truck's MPG:
Tailgate up (control test)
Tailgate down
Hard top tonneau
Mesh tailgate
No tailgate



Here are the results:

WORST: Tailgate down
BEST: Mesh Tailgate (a little more than 5% savings)
All of the rest were relatively the same, and having installed a tonneau recently I can confirm the lack of an MPG boost.


MORAL: If you're buying a tonneau for the sole reason of improving your MPG you're wasting your money. It seems like there's a lot of MPG improvement myths when it comes to vehicles, but this one is especially bad because tonneau-cover MPG improvements seems so intrinsically plausible. The bed just seems like a massive wind catcher!

This also shows that you shouldn't trust any manufacturer's claim on MPG improvement. With the internet, it's trivially easy to verify their claims so spend 15 minutes before spending a few hundred dollars on snake oil. Perfect example for me is the Throttle Body spacer. They supposedly improve MPG, but a quick search on the web told me (for the types of engines in a Dakota) that this really is a big scam.

Oh, and always be skeptical of perfectly nice round numbers! Many tonneaus claim a nice, neat, and perfect 10% improvement. Yeah, right!
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Old 10-12-2012, 09:12 PM   #18
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Quote:
Originally Posted by Gingerman View Post
Heavy foot = low milage. Put up the fuel efficiency gauge, and see the affect of your technique. My mpg had improved with some behavior modification.

Also, I put a tonneau cover on, and it had a shockingly good impact on mpg. Highway driving, I I'm getting an average of 27mpg. Your results may vary, but the covert is paying for itself pretty quick. Bigger impact on highway than surface roads, but the overall average is up by about 10%, which is as advertised.
I hope the 27 is a typo, if not put the crack pipe down!
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Old 10-13-2012, 07:30 AM   #19
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thanks for the input, i'm going to wait it out and see what happens
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Old 10-13-2012, 08:21 AM   #20
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I have 4500 miles on my truck. The life time mileage is 15.5 mpg. I don't see it getting any better. I'll be happy when I can get rid of this truck.
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