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 ...

The big number on an EV's window sticker is in MPGe ... PHEV (the model formerly known as Prius Prime) has a combined efficiency rating of 127 MPGe when running on electricity stored in the ...

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.