Motor oil should be changed at least once a year regardless of mileage. I don't exceed 15k miles per year with my cars.
2007 335 coupe Alpine white, steptronic, sportpack, etc. (gone)
2006 X3 3.0 steptronic Titanium Silver, 2009 E92 335xdrive, next.... Caddy CTS_V!
13 Lincoln MKZ? hmmm.