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      12-27-2010, 04:04 PM   #10
king of the hills
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Drives: 335i coupe
Join Date: Dec 2006
Location: Denver, CO

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1994 530i  [4.25]
2007 335i Coupe  [4.07]
Originally Posted by jaybird124 View Post
No it will not reset.

I believe the rate that it goes down is based on the fuel metering (it's judgement on how hard the car is being driven), but there aren't any sensors to tell it the oil has been replaced or the 'quality' of the oil has been improved.
This is actually not completely true, as the car does indeed test the condition of the oil. You can read the attached for how it does this.

However, you will still need to reset the CBS after an oil change so that the car will take a new baseline at that point.
Attached Images
File Type: pdf Oil-sensor & change interval.pdf (81.1 KB, 401 views)