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Old time Dodge Shadows got 32 to 37 miles per gallon.
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Not according to
FuelEconomy.gov, they don't. They're listed as 23/28.
The regular Civic is rated for 30/40.
I also had a particular issue with:
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They provide no significant improvement of mpg's which equates to no improvement in air quality per mile driven.
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Amount of gas used does not equate to air quality. Even if you only compare greenhouse gas emissions:
2006 HCH2: 49/51mpg, 3.7 tons of greenhouse emissions annually
2006 Civic: 30/40 mpg, 5.5 tons
1993 Shadow: 23/28 mpg, 7.3 tons
1993 Civic: 30/38 mpg, 5.5 tons