By John Dodge

CHICAGO (CBS) — Ford Motor Co. has admitted that it overstated fuel economy on several new models and will be writing checks to the owners to make up for the error.

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The affected vehicles are 2013- and 2014-model year hybrid and plug-in hybrid vehicles, as well as most 2014-model year Fiestas.

Ford said owners of these cars to not need to take any action, and checks will be mailed by September 30.

The amount of money depends on the vehicle and whether it is leased or owned.

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For example, an owner of a 2014 Ford Fusion Hybrid SE will be getting a check for $750. If the car is leased, the amount will be $450.

The company has created an online page for owners to determine their compensation.

Most of the miles per gallon estimates will be adjusted by a mile or two. The Lincoln MKZ highway mileage has been lowered by eight miles per gallon. Owners of that vehicle will be getting a $1,050 check, the highest amount offered.

“Ford is absolutely committed to delivering top fuel economy and accurate information,” the company said in a statement.

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“We reviewed our entire line up to determine the vehicles that required further testing and revised the fuel economy ratings for the affected vehicles. No other fuel economy ratings adjustments are planned.”