[christofoo]

This is quickly becoming my favorite thread.

This testimonial result is +18%, even better than the CFD reduction in Cd, and that's on an Audi that's already limited by throttle loss. For a Cd of -5% you'd think the MPG would be more like +2%.

I know a guy who gets 32 MPG in a similar Audi. He's a jack-rabbit (goes without saying of Audi drivers), doesn't particularly hypermile, but drives the speed limit. Email her and let her know she can gain 2MPG by taking them off.

Reminds me of how a doctor who recommended a product made by the company I work for claimed our laser is 50% efficient "electrical-to-optical." I design lasers (but not that particular laser, thank heavens), and I worked that number out to 2.5%. I pointed this out to the company - guess who's word is in the marketing literature?

But seriously, I'm sad that VG's don't seem to work in the real world on the 80's-90's sedans rear windsheild problem. That's exactly where you'd expect them to work (I'd expect them to work). Not as well as a Kammback or boattail, mind...