Copied with permission from this thread on the Pajero Club forum:

Hi Dave,

Further to our previous conversation this afternoon, following is the
information regarding the use of Bio-diesel.

All Mitsubishi diesel-powered vehicles can be used with diesel fuel
blended with Fatty Acid Methyl Ester (FAME) that meets the requirements
detailed below (as specified by the "Common Position Statement"
announced by the five major diesel fuel injection equipment
manufactures).

1. Amount of FAME must be below 5 vol. %
2. Quality of FAME must conform to EN14214
3. Quality of FAME blended diesel fuel must conform to EN590

If the use of an alternative fuel has caused or contributed to a defect
or concern the warranty will be denied on the affected components.

The following websites will provide you with further information.

http://www.biodiesel.org.au
http://www.bp.com.au
http://www.ufop.de/download/FAME_Sta..._June_2004.pdf

Thank you for your enquiry.

Regards,