Because of an Environmental Protection Agency review of fuel-economy data, 78 vehicles that used to qualify as trade-ins under the government's "cash for clunkers" program no longer qualify, according to the Associated Press. And 86 vehicles that did not qualify earlier now do.

The "cash for clunkers" program provides consumers a rebate of up to $4,500 if they trade in a vehicle with 18 mpg or less. The program took effect the weekend of July 25.

The EPA says the change in the qualifying vehicles is due to a review of the fuel economy of 30,000 vehicles over 25 years. The cash for clunkers legislation required the review, which was completed the week of July 20. The review caused the mileage data to change upward or downward due to rounding.