It's interesting stuff! I'm both too chicken and too time-poor to do much along the same lines
I'm more of a mild hypermiler than an ecomodder :/
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'97 Honda Civic DX Coupe 5MT - dead 2/23
'00 Echo - dead 2/17
'14 Chrysler Town + Country - My DD, for now
'67 Mustang Convertible - gone 1/17