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      12-28-2010, 08:59 AM   #13
Wingman335's Avatar

Drives: 2011 335i E92
Join Date: Aug 2010
Location: TX

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Originally Posted by raceyBMW View Post
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.
Excellent info. However, this means that the CBS will sense that new oil has been added (since it changes the dielectric properties that is used by the sensor to measure the oil quality). Won't this cause any changes in the mileage estimate of the oil change?

I apologize if I am sounding stupid- I just want to make sure I don't get hosed out of getting my next oil change by BMW. Surely I can raise this issue at the dealer, but I wanted to be prepared before going there.