I tried that last week and noticed that I didn't need to fuel up for a few more days. It does work: I drive a 1993 Olds 88 (one of the best cars I have ever, EVER had) and I saved a few more gallons, from 21-22 to about 23.5 mpg. It does work...plus after I lost my job, I got a part-time one which requires far less stop-and-go and less time dealing with urbanized traffic. Solution? For now, better gas mileage. But since a factor in wasting gas is stopping your vehicle, perhaps we need more inventive public transportation.