how do you warm up you car?

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Dec 29, 2003
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Hong Kong, China
I use Mobil1 15W50 in my BMW 740 and what I do is let the engine idle for about 30 seconds after start to let the oil go through the engine parts and then drive away gently. Is it a right thing to do? Is 30 seconds long enough for oil to go through the engine?
 
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