Tonneau or Topper ... Which gives better mileage? - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 31 (permalink) Old 03-08-2010, 03:48 PM Thread Starter
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Tonneau or Topper ... Which gives better mileage?

Ive got to get a cover for my truck. I'm thinking a topper due to having to carry my daughter's stuff back and forth to college... so i was wondering if the topper provided similar fuel savings as a tonneau cover.

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post #2 of 31 (permalink) Old 03-08-2010, 06:21 PM
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Re: Tonneau or Topper ... Which gives better mileage?

Yes, but gains for either will be minimal. Expect about 0.5 mpg. The folks making the 2-3 mpg claims are also the ones selling them.

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post #3 of 31 (permalink) Old 03-08-2010, 11:57 PM
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Re: Tonneau or Topper ... Which gives better mileage?

No. A topper will make your MPG worse. A tonneau improves your MPG.

Get a good tarp for the moving mission and a tonneau for everyday better MPG.

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post #4 of 31 (permalink) Old 03-09-2010, 12:09 AM
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Re: Tonneau or Topper ... Which gives better mileage?

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Originally Posted by Dave Whitmer View Post
No. A topper will make your MPG worse. A tonneau improves your MPG.

Get a good tarp for the moving mission and a tonneau for everyday better MPG.
Who makes a nice tonneau cover that doesnt cost an arm and a leg?

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post #5 of 31 (permalink) Old 03-09-2010, 12:23 AM
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Re: Tonneau or Topper ... Which gives better mileage?

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Who makes a nice tonneau cover that doesnt cost an arm and a leg?
I like the access covers. I like the the way they roll up. Great design. I think there around $400 or so. I like the original not the laredo. The original sits a little higher and gives you a little more room under it.
post #6 of 31 (permalink) Old 03-09-2010, 01:39 PM
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Re: Tonneau or Topper ... Which gives better mileage?

I just put on a extang trifecta. No permanent rails, folds up easily and removes just as fast. They right at $400 and I am happy so far.

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post #7 of 31 (permalink) Old 03-09-2010, 02:40 PM
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Re: Tonneau or Topper ... Which gives better mileage?

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No. A topper will make your MPG worse.
How so?

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post #8 of 31 (permalink) Old 03-09-2010, 05:23 PM Thread Starter
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Re: Tonneau or Topper ... Which gives better mileage?

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Originally Posted by Dave Whitmer View Post
No. A topper will make your MPG worse. A tonneau improves your MPG.

Get a good tarp for the moving mission and a tonneau for everyday better MPG.
Dave... i would have thought that either woudl have fixed the air flow problem that causes the MPG issue... Can you elaborate and give an example of how the topper does not and the tonneau does?

Rick

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post #9 of 31 (permalink) Old 03-09-2010, 07:12 PM
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Re: Tonneau or Topper ... Which gives better mileage?

Look at NASCAR. They do not have long bodys or chopped backs, they have a slanted back. This is for better aerodynamics. While the air is already split by the cab it still requires power to pull that camper top through the air.

The best bet would be to have a sloping canopy or hard top from the top of the back of the cab all the way to the tailgate. The next best would be a flat cover.

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post #10 of 31 (permalink) Old 03-09-2010, 08:32 PM
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Re: Tonneau or Topper ... Which gives better mileage?

A good topper weighs 300 lbs... I would think that would hurt your mileage...
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