In 55k kms the DPF light has never illuminated on my MQ. I do have an ultraguage monitoring a couple of things including one of the exhaust temp sensors, and I do notice it occasionally climbs up over 500 degrees for a short while. Not sure if that is related to an ECU initiated burn off, or just normal running. The oil level seems to remain constant between services so it doesn't appear to be being diluted to any measurable degree. Considering what a PITA the system was on my NS Pajero, the MQ has been a pleasant surprise.
GLS MQ Triton, ARB Summit front, rear and side bars, Carryboy canopy and rack, Dobinson heavy duty suspension, Harrop rear E-locker, Drifta drawers and a few other bits and pieces.