Not true - ran an experiment for one tank of gas - was working night shift. I posted that I never impacted any other traffic (literally or figuratively) in any way during the experiment. You seem to like to pick on the stuff with which you disagree and inflame it to dangerous proportions. My God!!!! What if a flock of nuns were walking across the street, your engine was off, you had applied the brakes so many times that they were not working any more, and still going 60 mph (though you never exceed 45 mph in town) and you crushed all of them? Is that worth 50 cents per week? The good that came from that week is that now that I am back to a normal schedule, and using normal driving habits, my mileage on my 6.0L 5,000 truck has been averaging over 17.5 mpg in town. It was well worth the time and learning.