http://blogs.edmunds.com/GreenCarAdvisor/.eea70a0

There's a lot of small print and red tape involved, and the gas price incentive has to be taken in lieu of most other incentives that Chrysler is offering at the time.

The subsidy is limited to 12,000 miles per year at the individual model's listed EPA combined city-highway fuel economy and is based on the price of regular grade, 87-octane fuel.

Thus, if regular gas is selling for $3.79 a gallon, Chrysler would pay the 80-cents per gallon difference. But if a customer chose to fill with premium at $4.09 a gallon, Chrysler still would cover only 80 -cents per gallon of the cost.

On a few vehicles, including the Dodge Ram 1500 pickup and the Dodge Charger sports sedan, Chrysler will continue to offer cash rebates along with the gas cards -- $3,000 for the Ram, which now has a $5,5000 cash incentive, and $500 for the Charger, which presently carries a $2,000 rebate.

Some of Chrysler's least efficient and better-selling vehicles aren't covered, including the entire SRT performance vehicle lineup, the Dodge Viper, Jeep Wrangler and Dodge Challenger and the Dodge Sprinter and Ram "chassis cab" commercial vehicles.