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Point of topic: The C230K is a cast block. Because of this, MB ships it with a blended "break in oil". I changed mine at 1000 miles, then again at 5,000 and I'll change at 5,000 mile intervals until I sell or trade it. So answer away...share your wisdom and prose!
Last edited by Rick; Mar 20, 2002 at 10:15 PM.
I'll let the dealer change it at 10,000.
I'll do it at 15,000.
They'll do at 20,000.
I'll do at 25,000. Etc.
If I followed the FSS, the original oil will be in the crankcase for approx. 18 months. That is crazy, synthetic or not.

