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      09-21-2012, 01:19 PM   #11
tuco44
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Drives: 2012 E91 328iTouringxDrive BSM
Join Date: Apr 2007
Location: Western Canada

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It is oil temp, so 10 miles or 10-15 mins is not unreasonable, and it depends a bit on outside temps.

It is better to warm up an engine under gentle driving than idling. This is not new nor limited to BMWs.
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2012 328iTouring xDrive Black Sapphire

Previous BMWs - 2012 135i MSport 6MT Jet Black(sold), 2012 135i MSport LMB DCT(sold), 2011 X3 35i MSport VR (sold), 2009 M3 Sedan AW (sold), 2008 535xi MSport AW (sold), 2007 328xiT Barbera (sold), plus 11 others in the 70s & 80s.