I have a Yaris! It's the 3 door with the 5 speed manual. When I drive between Baltimore and Washington D.C. I usually get between 46 and 52 mpg (it's mostly down hill). My best tank was 47.6, but winter has been hurting.
With the tires pumped to near the sidewall max the Yaris can coast real good--even in gear. And the injectors shut off while in gear with your foot off the go pedal.
Here is trick that someone at Yaris World found:
Hang Time: Exploiting ECU Fuel Maps for Fuel Efficiency - Toyota Yaris Forums - Ultimate Yaris Enthusiast Site
My fuel log!
