mika
Still Wondering
You will receive multiple responses to this question.
The generally accepted point is when oil consumption stabilizes. The idea is that the rings have seated and you can change to synthetic at that time. Your indicated mileage is in the normal range for conversion.
In Nov 1999 CHP issued a service directive to change to synthetic oil at the 6000 mile service. BMW approved the directive. So there seems to be a range in what is acceptable.
The generally accepted point is when oil consumption stabilizes. The idea is that the rings have seated and you can change to synthetic at that time. Your indicated mileage is in the normal range for conversion.
In Nov 1999 CHP issued a service directive to change to synthetic oil at the 6000 mile service. BMW approved the directive. So there seems to be a range in what is acceptable.