The Environmental Protection Agency decided against the idea of giving new vehicles sold in the U.S. a letter grade of A, B, C, D, or F for their fuel mileage. Here's a breakdown of the new sticker, which goes into effect for the 2013 model year:

1. Type of fuel used.

2. Traditional fuel economy in mpg, weighted average (larger), city and highway for gas, diesel, and CNG vehicles.

3. Comparison with other vehicles, showing lowest and best fuel economy in the car or truck's size classification.

4. How much you save, or spend, compared with the average vehicle as expressed in number 3.

5. The consumption-oriented European-style fuel economy measure, expressed in gallons used per 100 miles, using the combined city/highway number.

6. Annual fuel cost, based on 15,000 miles per year and a projected per-gallon fuel price.

7. Fuel economy and greenhouse gas rating, from 1 (worst) to 10 (best). The numbers are the inverse of each other-the higher the mpg, the lower the CO2 emissions.

8. Specific CO2 emissions expressed in grams per mile.

9. Smog rating in the vehicle's class, combining nitrogen oxide, non-methane organic gas, carbon monoxide, particulates, and formaldehyde. Electric vehicles get a zero.

10. The "your mileage may vary" disclaimer.

11. QR code that lets you use your smartphone to compare the vehicle with others, and more information at fueleconomy.gov.