This is a chart I remember seeing as well. In fact, I think I posted it somewhere, although it may have been on another site.
Cash For Clunkers – Car Allowance Rebate System Overview
Summary of Car Allowance Rebate System - Cash for Clunkers Voucher Qualifications
Min. Fuel Economy for New Vehicle $3,500 Voucher $4,500 Voucher
Passenger Car 22 mpg *
Mileage improvement of at least 4 mpg - $3,500 Voucher Mileage improvement of at least 10 mpg - $4,500
Light-Duty Truck ** 18 mpg * Mileage improvement of at least 2 mpg - $3,500 Voucher Mileage improvement of at least 5 mpg - $4,500
Large Light-Duty Trucks *** 15 mpg *
Mileage improvement of at least 1 mpg - $3,500 Voucher or trade-in of a work truck Mileage improvement of at least 2 mpg - $4,500
Commercial trucks ****
Trade-in must be at least pre-2002
http://www.cashforclunkersfacts.com/
I believe that is what I said?