OK how about this and proving hypermiling is worth it,
I have a 2005 chevy colorado pickup, it has no mods to it, I purchased a scan gauge for it, I can consistently get 35 MPG out of it.. the truck is a 25mpg High way rated truck. and I used to get 25mpg with it before the scan gauge and hypermiling techniques, I calculate that at 15k miles a year it will save me $688 in gas savings with gas calculated at $4 a gallon.
The scan gauge only cost me $160 so in the first 3,000 miles the scan gauge paid for its self, after that its all gains in my pocket.
I calculate making a Areo topper from foam and fiber glass would cost me about $500 would it pay for its self, I'm sure it would easily pay for its self with in a year.
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