If the Volt II gets 300 MPG, and the other 9 models only get 30 MPG ... the average will be 57 MPG ... and the car company meets the regulations.
What an utterly stupid law.
If you stick one hand in a bucket of ice water and the other hand in a bucket of boiling water, on the average you should be perfectly comfortable.
It won’t be long before there is no “fleet average” allowed.
From wiki- coverage of medium duty trucks has been added to the CAFE regulations starting in 2012, and heavy duty commercial trucks starting in 2014.
So soon there won’t be any exceptions and ALL vehicles will be high mileage foil covered over priced ugly death traps.