Quote:
Originally Posted by GRU
when you are in D and let off the gas at about 40 mph does the car slow down really fast or does it coast good? My automatic does a good job coasting while in D so i speed up to about 40 and coast stop signs, street lights, or turns, then speed back up again and that's helped by fuel mileage about 10-15%
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I did multiple coast down tests from 35 to 30 and consistently had it take 15 seconds to drop down that amount. Recently I did 55 down to 50 and it took about 12 seconds however it was on a slight up hill as I was traveling, skewing the numbers a bit shortening the length of time it would take to coast down. I hope that helps.