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Old 11-20-2008, 10:19 AM   #11 (permalink)
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Join Date: Nov 2008
Location: vermont
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CivySi - '03 honda civic SI
90 day: 31.99 mpg (US)
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Originally Posted by MetroMPG View Post
At $3 gas, 6750 highway miles/year*, 23 mpg = $58 savings. Less as gas drops, more as it increases obviously.

Another note: the speed of testing was just 89 km/h / 55 mph. Actual savings of course increase with speed.

(* that's 45% of EPA's average annual distance of 15k miles total city+hwy)
right but to build it out of anything even semi permanent is going to cost more than that...

though, 6% is a good number, and nickle and diming works both ways so it could help to lead up to an impressive deal. but wouldnt a small roofline extension and short side extensions give almost all the same benefit? (I felt I should actually add something productive instead of whining about a giant kamma) cause thats something that would more likely be put on more vans an such, a few short little extensions could look cool even

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