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BMW 3-Series (E90 E92) Forum
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20,000 Miles before an oil change?
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| 11-30-2005, 07:07 PM | #23 |
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Second Lieutenant
 
6
Rep 230
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AZMike:
Wow. I read that the oil condition sensor is called a OZS. Does this stand for "Oil Impedance Sensor"? (Impedance being the inverse of resistance) Just a WAG, but it could measure the resistance of the oil. More metal gives a lower resistance reading. Could be a cheap way of sensing the oil condition. Admitted, this is just a wild guess. CM
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