Quote:
Originally Posted by Elk
This is the grey area.
There is no credible reason to change synthetic oil at 3,000 miles. There is similarly no credible reason to wait until 15,000 ("BMW tells me to" is similarly unsupported, but for anecdotal insistence and supposition)..
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BMW tells me to only put 91 octane gas, but I'm been putting 87 octane for years.....if BMW wants the car only to last 100k miles the easiest way to destruct the car is not to impost gasoline requirements. If you believe that ones should change oil at 7500, then ones should only put 95 or higher in BMW. BMW build the car, they know more than mumbo jumbo out there.
There is no free oil changes outside of N.A. And BMW still recommend 15000 miles change in those countries. We would hear a lot of owners in those countries raise hell if BMW engine fails prematurely because of oil change interval.