Gas mileage & rear wind deflector? (1 Viewer)

[OldGrump]

This may have been covered before, but I can't find anything under the Search Forums.

Does the rear wind deflector have any effect on gas mileage? On one hand I think it would help but on the other hand I think it wouldn't .....

Any help or ideas????
Thanks...

 

[mobi-arc]

I would think it's presence has a negligable effect on mileage.

 

[OursSauvage]

Just a question...
What is this wind deflector's reason of beeing ?
keep the rear windshield clean? cosmetic ? wiper helping ? ...
Or only to make french guys having something to speak about ?

 

[Wellcraft19]

How about all of the above...

 

[Morty]

I think the main purpose is to keep the rear window clean. If you take it off and drive for a few days without it, you'll be amazed at the difference--especially in poor weather or dusty conditions.