I think pick-up trucks that see lots of highway miles are great candidates.
Among cars? I think the Honda Civic is a terrific candidate:
1) Very, very plentiful/popular model
2) The basics are there ... so good aero mods will only accentuate a fine aero shape.
3) Has a hybrid version and you have to think many hybrid owners would love to boost their mileage by another 10-15%
Most of the above goes for the Toyota Prius as well.
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--- Bror Jace
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