I just changed the oil in a 2010 Ford Fusion with the 2.5L I4 engine and took pictures of the process to create a quick guide to help out other owners. The procedure should also be very similar for the 2006-2009 Fusion with the 2.3L Duratec 23 I4 engine and any 2006-2012 Fusion with the 3.0L Duratec 30 V6 engine.
To reset the oil monitoring system to 100% after each oil change (approximately 7,500 miles [12,000 km] or six months) perform the following: 1. Press the SETUP control to enter SYSTEM CHECK, then press SETUP control again to display “OIL LIFE = XXX% HOLD RESET = NEW”. 2. Press and hold the RESET control for two seconds and release.