Buyers of a new 2010 Fusion Hybrid or Mercury Milan Hybrid this year will qualify for a $3,400 tax credit, the highest credit amount offered for hybrids. The base MSRP for the Ford Fusion Hybrid—which is rated at 41 mpg in the city and 36 mpg on the highway—is $27,300.

Toyota produces two midsize sedan hybrids with comparable fuel efficiency, the Toyota Prius and Toyota Camry Hybrid. Both vehicles sell in the mid-$20,000 range—but Toyota vehicles no longer qualify for the hybrid tax credit because the company has exceeded the 60,000-unit limit built into the federal incentive program.

Low gas prices have put a damper on sales of fuel-efficient vehicles, including small cars and hybrids. The $3,400 tax credit could stimulate interest in Ford’s new hybrid sedans. Derrick Kuzak, Ford group vice president of global product development, said, “We’re glad to see our government help promote these advanced, clean fuel-efficient vehicles to the consumer.”

The 2010 Fusion and Milan Hybrids join the Ford Escape and Mercury Mariner Hybrids, doubling the company’s hybrid product offerings and volume.