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Old 12-10-2012, 10:13 AM
jburke4689 jburke4689 is offline
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Location: Ellicott City, MD
 
Join Date: Apr 2008
Posts: 633
Mein Auto: 2007 335i
Even in Winter, my 335i is cranking out cabin heat in 1 mile so the engine is warmed up pretty good by 4 miles. The only thing not warmed up in the engine would be the oil. It won't get hot enough to boil off water or other contaminants so I would go with the "rough service" shortened oil change interval.
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