How Vehicles Are Tested
Fuel economy is measured under controlled conditions in a laboratory using a standardized test procedure specified by federal law. Manufacturers test their own vehicles usually pre-production prototypes and report the results to EPA. EPA reviews the results and confirms about 10-15 percent of them through their own tests at the National Vehicles and Fuel Emissions Laboratory.
Estimating MPG with Laboratory Tests
The energy required to move the rollers can be adjusted to account for wind resistance and the vehicle's weight.
Monday, March 2, 2009
How Vehicles Are Tested
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