Bikes & Cars...

NASCAR has become the latest partner of the Driver $marter Challenge, a campaign to increase awareness about the little steps we can all take to increase our fuel economy, no matter what we drive. (Readers of GoodGreenCars.com know all about these tips — the tires, the excess weight, the speed limit obeying.) Other partners include 3M, Con Edison, and Exxon Mobil.

NASCAR will give the challenge props on its reality show,...