Our DTC is a dry clutch system, VW/Audiīs DSG as used in the GTi/GLI is a wet clutch system where the clutches are oil bathed for operation and cooling. In Fordīs DTC, oil is not
used for continuous clutch operation and is only used for gears and actuators, so its oil does not degrades as fast and does not requires to be changed as often as VWīs.
I used to own a 2007 VW GLI with the wet clutch DSG and as per VW requirements its DSG oil was to be changed every 40,000 miles.
However, neither Fordīs DTC or VW/Audi's dry clutch DSG require such frequent changes since they use their oil only for internal lubrication like a manual transmission and not for the clutches operation.