Re the DPF warning coming on after 11,200 miles. I understand the light is also used as a service indicator and has to be reset when the oil is changed otherwise the ICU thinks the oil hasn't been changed and tells you so. I had my 6TS serviced at a local independand garage and this happened 1100 miles after the service. The garage claimed they knew nothing about resetting the service indicator which isn't included in the open service software they have. It cost me another £200 for a second oil change and a reset at the main agents, whom I don't like due to their patronising attitude. It seems that only Mazda agents have access to this particular bit of kit. If true it sounds very like protectionism at our expense.
Thats what i thought it might have been originally but dealer told me the the level / % of diesel mixed into the oil was the reason it came on ( flashing ), so does anyone know anything about this sensor? I used to change the oil every 6000 miles on the old cars that i had, but i agree having to reset ecu or is it icu, after oil change is just another way of stopping the average man looking after his motor cheaply i cant believe what they charge for just a oil change nowdays, maybe its just me. Anyway managed 48mpg after the service so pretty happy with that