The new rating is based on the tire's rolling resistance, which contributes to the overall efficiency of the vehicle. The new stickers are actually a requirement of the 2007 energy bill and NHTSA ...

In the meantime, consumers should be aware that they might not get the efficiency promised on the window sticker ... are allowed to comply with the new ratings for many models using mathematical ...

while FES is a fixed sticker with the DOE logo, essential vehicle information and the engine’s fuel economy performance rating. To facilitate efficient issuance of the FEL and FES, the DOE has ...

That sticker will show that the ... for the 100-percent electric Nissan LEAF, rating the vehicle to be "best" in the midsize vehicle class for fuel efficiency and "best" for the environment.