6MT - Coasting in neutral hurts mpg?
Yesterday I started thinking about this while stuck in rush hour. Many times while driving I will hold down the clutch to let the car coast when engine power is not needed. However I remember reading something that these engines can cut fuel when coasting. Which led me to believe coasting in neutral is wrong:
1) The car has to use gas to idle the engine while in neutral
2) The car can cut fuel when coasting and in gear as the wheels are spinning the engine
My unprecise anecdotal tests barely confirmed this to be true
What are your thoughts?
2009 335i 6MT M-Sport AW/CR Convertible & Border Collie