The Chevrolet Volt missed out on SULEV (Super Ultra Low Emissions Vehicle) status by a minute margin, emitting 1.3 grams of CO2 per mile. The cutoff is 1 gram of CO2 per mile to qualify for the status.
By these standards, the Volt emits more CO2 than a VW Golf TDI, Honda Accord 4-Cylinder sedan (a PZEV vehicle according to California) and the Volt’s chief rival, the Toyota Prius. The Volt will also likely fail to qualify for access to the HOV lanes on California freeways, a perk considered attractive by many Volt buyers in traffic-snarled California.
[Source: Inside Line]