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Doug Miller Doug Miller is offline
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Default Coasting in neutral doesn't save gas

In article , ransley wrote:
On Jul 30, 9:29=A0am, "HeyBub" wrote:
So says Popular Mechanics:

http://www.popularmechanics.com/cars...ting-in-neutra...

'Course the author is assuming an internal combustion engine. Presumably
with a hybrid, the coasting actually CHARGES the batteries, thereby
increasing gas mileage. I'm not even going to get into external combustio=

n
engines...


I dont buy it, it isnt a gasolene consumption issue, when coasting in
gear the engine is not moving at idle speed, the extra rpms are a drag
on the transmission and lower mpg,


That doesn't make any sense at all. If the injectors are delivering no fuel,
none of that matters. The engine isn't consuming any fuel, but the vehicle is
still moving forward: mpg is infinite.

the trans also has more drag being
in gear. He is only thinking gasolene not drivetrain friction loss.


According to the article, coasting in neutral burns gas, coasting in gear
doesn't. If that's correct, then OBVIOUSLY you use less fuel coasting in gear.