The incentives keep flying as the automakers try to move metal in this tough market.

Chrysler Group LLC, looking to clear out sales of 2009 models, will double the federal government’s cash-for-clunkers program that will launch Thursday.

Chrysler will offer up to $4,500 cash or 0% financing for 72 months through GMAC Financial Services on most 2009 model vehicles. These incentives are valid through Aug. 31, 2009.

The incentive program, designed to improve the fuel economy of the nation’s fleet, provides a voucher of either $3,500 or $4,500 for trading in a vehicle that averages less than 18 miles per gallon in combined city and highway driving and is not more than 25 years old. The amount of the credit is determined based on the incremental fuel-economy improvement between the old and new vehicles.

The Chrysler incentives will apply to any buyer regardless of the age and fuel economy of the trade-in vehicle, said Steven Beahm, Chrysler vice president of sales operations.

Ford announced that they will not match the incentives, which isn't surprising given's Ford's recent success in the marketplace.