CALIFORNIA AIR RESOURCES BOARD DOESN’T LOVE THE VOLT: CARB rules the Chevy Volt is a ULEV, emits more than Prius or Jetta TDI. “The trick is that these tests need to be done with an engine running. Since the Volt doesn’t need to burn any gasoline to move, under many circumstances – and the Volt engineers even needed to develop a maintenance mode to deal with the new problem of aging gas in the tank – the Volt is a special beast and, probably to GM’s dismay, it doesn’t benefit from its battery-only ability in this test.”