All is revealed,...thanx for that link,..I mean WTF are they thinking? Trying to get the most out of your engine is not being helped by these insane measures. Stick the particulate filter in a position where it can be manually cleaned [if need be]. That way everyone is happy,..and it gives the owner an extra way to kill half and hour every couple of weekends
JJ
Particulates are pretty bad for people's health, so IMHO the requirement is reasonable to have a filter. However, perhaps should have phased-in bio fuel blend over longer period of time.
However, it seems after more reading online (I don't own a diesel model; I am in the US), that down-under it's a pretty big deal, especially for Mazdas:
http://forums.whirlpool.net.au/archive/1921061 (look for garax 's post from july 1st).
It seems excessive amount of diesel gets into the oil. Theoretically, this engine will not be good for short trips only: need a good run to make sure the filter is cleaned and excess diesel burned / evaporates. However, some drivers with long daily commute reported rising oil level too. People are upset they need to do an oil change more often than their manual states, think it's a defect and don't like to check oil level every 1000 Km (~600 miles). Some people are concerned about having potentially diluted oil damage their engine.
Seems however that Mazda might have fixed the issue in later model cars (but can't find proof, so maybe not). They definitely know, as they released the pamphlets. Some people report no oil level changes. A similar issue with Honda Diesel engine had a recall in the UK for reprogramming the ECU. Some people listen for regen cycle on their filter and make sure it runs to it's completion (not sure how).