Not going lie, this is a point that one would think would be settled by the company! We heard the same 12,000 by the college freshman-looking salesman when we bought it. Changing it at 10,000 instead. Easy to remember, goes along with my BMW 440i intervals. That car has the same engine (one of the reasons we bought the grennie), tuned to run at even higher RPM's, and turning 225,000 this week. There...I just jinxed it.