I have a 2006 FIAT Punto 1.3 diesel that I'd be keen to use bio-diesel in, provided I wasn't going to void the warranty. (I think the base model does not have a particulate filter, which seems relevant to the issue.)

The owner's manual and warranty booklet note that bio-diesel's okay provided it's certified to European standard EN590. A B100 retailer in Kempsey tells me that he believes the product is made to internatioanl standards and should be okay, but suggested I speak to the producer.

ABG (the producer) tells me that they manufacture to the Australian standard "which is similar but not identical to the European standard". It notes further that it recommends passenger vehicles use a B5 blend and that's what most retailers in NSW and Qld sell.

I'd be grateful of feedback from anyone who knows the car and the products (or knows anyone who uses bio in their FIAT).

Can you go and watch it being made and discuss the procedure/ additives with the producer? The lack of DPF is the important bit How long's the warranty on it, 5 years? The other important thing to remember is to change the fuel filter after the first few hundred miles as biodiesel will clean the tubes of any gunk and leave a residue. Once this is done you should find the car runs generally cleaner.

There are quite a few threads around the forum on biodiesel, have a search and you'll find lots of useful information

ps. I was down near you the other day and am now back up near Alston, are you from up this way?