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Originally Posted by Quicksilver
Technically that's correct but those light are tied to driving habits so that's why the maintaince manual says once a year and my dealer honored that time duration as a valid period without the lights and did the free oil service.
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Problem #1: The Owner's Manual says two years, not one (see page from 2005 X5 manual below).
Problem #2: Some, but not all Service and Warranty Information book state the mandatory oil change interval is 1 year. Some don't state anything.
Problem #3: The less seasoned service advisors only understand the interval lights as the basis of an oil change.
Therefore, YMMV from dealership to dealership.
Jonk - print out the TSB mandating the annual oil change and take it Jason Giambi. Then tell him his cousin sucks too...
http://www.xoutpost.com/articles/x5/g...hange-tsb.html
What we should do is send your 25.5K old motor oil to the test lab to see how well the oil and your engine stood up through such a long interval.