As an ecomodder you will probably not see much improvement in mileage from an hx to a dx or lx model in the years you are considering. I'd expand your search to include these models. 40+mpg is very achievable with any of these three. The EX model is the one to avoid due to much lower gear ratios.
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In the garage:1993 civic 1978 hobbit 1976 jimmy
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