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Old 01-25-2013, 08:32 AM
Taeksoo Taeksoo is offline
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Location: Palatine, IL
Join Date: Oct 2012
Posts: 114
Mein Auto: 2013 335i Sedan
Originally Posted by d geek View Post
Most modern vehicles cut fuel when your foot is off the go pedal. So even though you see the rpm's moving up and down you should understand that most of that is caused by the wheels turning the engine not vice-versa. Bottom line is that it does not negatively impact fuel economy.

Downshifting helps reduce brake wear and as pointed out above puts your trans in the correct gear for moving out again.
Alright that makes sense.
My last car was 12 years old before I got this so haven't notice this type of things.
Also, would this be bad for your transmission? I'm sure BMW has thought of everything and I'm sure it's ok but I'm just curious. My understanding is that if you have manual transmission and engine breaking would be bad on transmission. But then again this could be decade old fact.

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