1991 Renault Dodge 50, 7 1/2 ton recovery truck and 1998 Merc C250TD. Both 100% bio.
Have to change Dodge fuel filter once a year which only does about 1k miles yet Merc can do 12k miles with no filter problems. Merc makes up for it by blowing off diesel return lines occasionally [despite it being low pressure and me changing them to Viton with clips to hold down].
