CBS data and engine oil change
I have done 35k km in five years of ownership. I change my oil and filter on a yearly basis without waiting for the warning on the car. When I perform this irregular oil changes I don't reset the onboard computer, and let it countdown on its own. Theoretically, I've had one oil change reset, and counting down to my second.
Recently I purchased the Bavarian Technic software and cable. Upon accessing the CBS data through the OBD II port, it was shown 5 oil changes and counting down to the fifth with 21k km to go. Which means the computer has automatically reset following my recent oil change.
I performed by recent oil/filter change in December with no reset. But it appears though the onboard computer is factoring in the quality of the oil circulated through the system and automatically adjusting the DME where the oil change data is kept.
In fact when I look back, I have done four oil changes plus one at 2k km following the break-in period. So the count it was showing is correct. This is really puzzling.
If that's the case I should have got a warning after the third oil change to change the spark plugs, if you go by the service booklet.
Can anyone shed some light on this please?
2007 E92 6MT - Silverstone II with /// Performance Exhaust with ACM Test Pipes and BPM Sport Stage II Dev-Tune - Proper engine warm up, 12-monthly oil change, Castrol TWS 10w-60
2011 F25 X3 3.0d