jonathan18:

alasta:

meesham:

alasta: 
 - The diesel engine is prone to the particulate filter clogging up if driven continuously for very long distances in slow stop/start conditions.

The Mazda particulate filters are designed to burn off the excess soot when driving at highway speeds, if you buy one you need to make sure you drive it for a good drive every couple of weeks. The early CX-5 diesels were particularly bad for this, when it gets clogged up the car switches itself into limp-home mode.

Yes, it's not a problem for me because I use public transport around town and my car only gets used for highway driving, but for an Aucklander using the car daily in heavy traffic it could become a problem.

For me this reason alone is enough reason to think twice about buying a diesel again; the particulate burn off is a real PITA in my Mazda 6 diesel, as I use it as my daily commute car within a small city. Also agree the figures don't stack up unless doing high-sh ks. Until RUCs are sorted, the system's against smaller diesels.

All that aside, I love the engine. Used it for towing for the first time recently and didn't even notice the heavily laden trailer attached!