Just got a z4mc. Fantastic car. Glad I did it. Looked for a couple of years at m3s, but never tempted. Wanted a car with S54 engine and finally bought Z4MC. Looks a bit like a triumph GT6 i had when a kid. Maybe that's why I bought it. Mileage higher than I really wanted at 64k but looks sounds and drives OK. it will be a weekend drive only. Was hoping to keep the miles down but fun to drive so now expecting increase. 7000 miles to next oil change but oil is black. What's the recommendation change it now or wait?

