“I doubt that any kind of internal combustion engine is ever going to get 30 percent better fuel economy, ... I’ve done enough of this to know it’s very, very challenging to come out well ahead of the game.”
“The technology in cars and light trucks has been steadily improving. But what we have done is buy bigger, larger, more powerful, faster-accelerating vehicles, with more onboard amenities -- and all of that efficiency gain has been used up.”
