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Ah, I have seen that paper before, but it's worth another read.
Really, .31? Every source says something different...But yeah, you would get a lot of good out of aeromods.
You weren't "Wrong" on the fuel economy, but there are different tests used by the EPA these days compared to the old tests.
I think if you could get 250+ pounds removed it would be worth it. I would strip the interior and things as well.
I'm not sure on .25 out of just that. Compare to the insight, which is rather definitively known to be a stock .25...Some wheel covers and a boattail would definately help. Mehbe treb will chime in, but he has a breakdown of where aero drag occurs and I think about a 1/3rd is after the car in the wake.
I doubt how much electronics will help on a highway trip. It's already doing fairly well with the lean burn and you won't be stopped too much. However, combined with good aeromods and LRRs, I think driving technique could bridge that gap.
I think I'm something like 80% over epa in my car, but then I started with an auto...darin has done 130+ mpg circuits with his metro. *shrug*
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