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Old 10-17-2008, 08:39 AM
Vanos4:12PM's Avatar
Vanos4:12PM Vanos4:12PM is offline
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Location: nashville, TN
Join Date: Apr 2007
Posts: 1,645
Mein Auto: 2005 e60 6sp black/black
Originally Posted by desertdriver View Post
the most critical apsect of warmup is the oil temp. this is because oil viscosity changes with oil temp. When the oil is cool, it does not lubricate your engine properly(its too thick), especially if you run it hard. BMW's use of the oil temp guidelines will help your car last longer by preventing you from running your engine hard under substandard lubrication conditions. With an engine that has such close tolerances(any finely engineered powerplant), the oil must come up to a sufficient temperature so it is not too thick to lubricate properly. Kudos to BMW for using a better way to help you take care of your car. If you ignore their recommendations, the risk is higher engine wear and shorter engine life. If you live in temps near freezing, it can take 20 mins or more to warm up your engine to the optimal operating temperature needed to run it hard if left out overnight.

It just kills me when on cold mornings, Sub 20 or so, I see people pull out of neighborhoods, etc. and just FLOOR it when I know the car has been running less than a minute. That poor engine...........
2005 530 6 speed/Sport/Prem/Cold black/black
2011 328i Sedan/6sp (lost to an accident and she is now at the big Roundel in the sky. )
1997 328i - gone "my first love"
BMWCCA # 367299

ED May 14, 2010
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