A listing with two emission standards (e.g., Tier 2 bin 5 / ULEV II) denotes a single vehicle carrying both a federal and California emission certification. Green scores for such listings reflect the cleaner of the two certifications.
Battery-Electric Vehicle Fuel Economy:
Fuel economy for pure battery-electric vehicles is provided in miles per kilowatt-hour.
Plug-in Hybrid Fuel Economy:
Fuel economy for plug-in hybrids is provided in miles per gallon for gasoline operation and in miles per kilowatt-hour for electric operation.