I just have to say that I was getting 34mpg or so in the winter before I over inflated my tires. I drive 22 miles 45 minutes each way, every day to work and back with about 12-20 lights in between. By the time I get up to about 35 or 40 mpg I have to break for the next light. There is no real way to time the lights because I either have to accelerate very fast to get through the light or drive slower than 20mpg. They may be driving a similar route.