EIA: fuel economy improvements bring diminishing returns in fuel savings
Green Car Congress
JULY 15, 2014
For example, switching from a 10-mile-per-gallon (mpg) vehicle to a 15-mpg vehicle saves more fuel and results in greater fuel cost savings than switching from a 25-mpg vehicle to a 75-mpg vehicle. Vehicles that use fuels other than gasoline, such as diesel or electricity, will have different fuel savings and fuel cost.
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