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Old 12-19-2014, 07:40 PM   #32 (permalink)
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not even on big trucks!?

Originally Posted by euromodder View Post
Nobody on here has been able to proof they do improve FE, and it wasn't for lack of trying

I still think they could work, but not in the usual massively/truck-sized variety on a regular car.

Something more subtle might do the trick.
Renault / Dacia had them on the rear roof line of their eco-Logan.
Apparently they don't even work at big-truck scale. See section

Wish they did. My boxy-backed Smart Fortwo should be able to do better than the measly 38-39 it gets. Well, I do break 40 when I can keep it to 65 with no stop and go traffic, but how often does that happen?

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