Hey, just read this post.

I have had bad problems with the "normal operation of the DPF" system on my Mazda 6 and there is a huge thread on it leading me to have an engine over-run due to unburnt fuel in the engine oil causing the engine to run of its own fuel.

I then recentely found out and read loads on bio-diesel & how it affects the DPF system leaving the un-burnt fuel in compartments of the engine leading to an increase in wear and corrosion? With 2005-2009 DPF systems the system cannot get to the certain temp. to burn off the bio-fuel which gets left behind, but! mostly all new diesel engines from Feb 2010 have a ceramic diesel particulate filter or some other technology which allows the system to burn the fuel at a much higher temp.

Anyway, my handbook like the rest of yours states not to put any more than 5% bio-fiel in your engine - i have got confirmation that from April 2010 Shell petrol stations have increased their diesel pumps to include a max of 7% which they state is an increase from approx. 5%. Even when this labelling regulation came in, i have not seen one petrol station that has any sort of label explaining the bio-fuel.

The big question as you all ask - if our handbook states 5% and no more, why are the manufacturers not recalling the cars so we do not invalidate our warranty, or we should at least have confirmation from them to state we can use 7% bio-fuel and if we happen to come across any problems we will fix your cars under the original warranty.

I have not heard any of this, so us DPF systems, including just standard diesels are becoming more vunerable to wear and leading to dangerous situations like i was in.

Can anyone help me on this if you have heard any new etc? Also, please do not point at my comments above, i have only just started to understand this bio-diesel so you technical heads out there be kind :)