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      05-23-2011, 10:54 AM   #20
rs6655
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Drives: 2009 X3 (MT)
Join Date: Jun 2009
Location: Florida

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Quote:
Originally Posted by flash3 View Post
All,

I am at half tank now since picking up the X3 and trying to figure out when will be the best time to fill the tank usually on my x3. Is it best to fill the car @ half tank, quarter of a tank etc? Is there a best time/level?
The short answer is never let it get low enough to run out. Not just because you'll have to walk but because it damages your fuel pump.

I know it sounds counterintuitive but the fuel actually runs through the motor of electric fuel pumps. As such they are cooled and lubricated by the fuel. If you run dry your pump is running with no lube and coolant. I try to keep my tank above 1/4.
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