Quote:
Originally Posted by SattyFanX4
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Excerpt from book:
(Deceleration is not the same thing as coasting. Coasting is when your foot is off the gas and the car is out of gear; deceleration happens when your foot is off the gas while the car is still in gear. We decelerate many times each day.
But did you know that deceleration is the time when a car gets its highest possible gas mileage? About 18 percent of all city driving is spent decelerating. Long decelerating approaches to mandatory stops (car in gear, foot off gas) can yield up to 100 mpg (yes, you read that right, 100 mpg!) for the period the car decelerates. It's a valuable method to use to build up your miles per gallon. Don't rush up to stop signs or traffic lights and then slam on the brakes. Use a long, smooth decelerating approach and watch your mpg start to climb. If you have a trip computer that gives instant miles-per-gallon readings, watch the mpg skyrocket every time you decelerate. This is one of the most important, and easiest to implement, suggestions given in this book.)
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CO ZX2 writes:
Statement above is absolutely false and reveals the author's real knowledge of how a car works and his ability to give advanced advice on hypermiling.
It is well known that deceleration in gear uses kinetic energy already produced to unnecessarily rotate the engine. That drag results in drastic reduction in distance travelled, akin to brake application. On level terrain, a car will coast in neutral approximately three times farther than in gear. Engine either on or off. Click Coasting Info link below in my sig.
Highest possible gas mileage will be achieved with Engine Off Neutral Coasting, using stored kinetic energy, considerably more distance
using no fuel at all.
There were some good basic fuel-saving suggestions in the excerpts but I was very disappointed when I read the above two paragraphs.
a new policy....I intend to ignore the nescient...a waste of time and energy. 
Linear Mode
