How often do I need to get an oil change for a Cadillac CTS? Is it 3 or 6 months?

The dealership most likely recommends every 3 months. Regardless of type of oil I would stick to an every 3 month schedule because oil filters typically begin to fail in that time frame.How often do I need to get an oil change for a Cadillac CTS? Is it 3 or 6 months?every 5000 km or 3000 milesHow often do I need to get an oil change for a Cadillac CTS? Is it 3 or 6 months?every 3000 miles or 3 months wich ever comes first