Rock Tamers and MPG - Fiberglass RV

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Old 06-16-2008, 07:05 PM   #1
Paul Bostick's Avatar
Trailer: 2007 Casita 17 ft Spirit Deluxe
Posts: 39
When we bought our Casita last year I also purchased a set of the Rock Tamer mud flaps that fit over the hitch. Knowing that I was going to take it on a long trip this month I decided to check out the gas mileage with and without the Rock Tamers. Final count.

894 miles going down to the coast with Rock Tamers: 12 mpg.
946 miles coming back without Rock Tamers: 14 mpg.

Driving 60 miles per hour.

So, is the protection worth the lose of 2 mpg?

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Old 06-17-2008, 07:59 AM   #2
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Which direction was mostly down hill?

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Old 06-17-2008, 08:41 AM   #3
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Name: Steve
Trailer: 2003 Casita 16' SD
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I used the Rock Tamers for the first time this spring. I didn't notice any milage effect. Might vary with tow/trailer combination.
Quando omni flunkus, moritati
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