I don't know what to do about this one. I'm at 144k miles, and while I am unsure of the initial-owner maintenence (was a Starmark car, 1 PO) I have run Mobil 1 of 15w50 and now 5w40 (dealer) changed every 5k since 60k miles. The only thing I'm concerned about that could affect it's life is hard driving. My car gets vigorous exercise on the highway. I'm a bit trigger-happy when passing, etc, so it sees 5-3 kickdowns and redline probably 2-3 times a day. I wonder how negatively that would impact its lifespan.

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former: 83 300D, 97 C230, 93 400E

current: 08 C300 Luxury , 92 500SL