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      12-22-2012, 02:01 PM   #4
b1aze
Just one more taste...
 
Drives: 2010 135i
Join Date: Aug 2012
Location: Shirley, MA

Posts: 1,419
iTrader: (14)

Rpm is independent of speed. The speed your car is moving at and what gear you are in will determine the rpm your engine will be running at.

Did you change to snow tires recently? Or change wheels at all? It wouldn't surprise me that a small difference in speed in 2nd gear would equate to 500rpm difference, say, 3-5mph may be 500rpm worth.
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