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Neutral = has to be added. Stay in gear until you need the engine to idle. again coasting in gear = 0 injector activity as long as you do this.
But really ...its not that big a deal o.O. ..other factors affect your gas mileage so much more you may not even "notice" the benefit ..but there "is one"
its like making your car lighter. yes ...removing your floor mats DOES ...save weight. But you could remove your spare tire instead *shrug*. This is kind of like that ..yes it uses no fuel to coast in gear ..but just doing it up to stoplights?? thats like pulling those floor mats out for weight reduction.
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