This list is not exhaustive but will give you a good indication of which vehicles can use biodiesel;
Audi cars All TDI models since 1996.
BMW cars Model 525 tds/1997 onwards,
3 + 5 series diesel since 2001.
Case-IH Tractors All models since 1971.
Caterpillar MMT, Industrial, marine All engines except
Claas Combines, Tractors Warranties exist
Faryman Diesel Engines Warranties exist
Fiatagri Tractors For new models
Ford AG Tractors For new models
Holder Tractors Warranties exist
Iseki Tractors Series 3000 and 5000
Iveco Truck Cursor since 2000
John Deere Combines, tractors Warranties since 1987
KHD Tractors Warranties exist
Kubota Tractors Series OC, Super Mini, 05,03
Lamborghini Tractors Series 1000
MAN Truck Engine numbers 8953591
Mercedes-Benz cars, lorries, buses Series C and E 220, C200 and C220, a.o. Series BR300, 400, Unimog 1988 a.o.
Nissan car Type Primera since 2001.
PSA car All Hdi up to 30% biodiesel Blend*,
Tractors Since 1990
Seat cars All TDI since 1996
Skoda cars All TDI since 1996
Steyr tractors & boats since 1988
Series M16, TCAM and M14 TCAM
Valmet Tractors Since 1991.
Volkswagen cars All TDI series since 1996, new Sdi series (EURO-3).
Volvo Personal cars Series S80-D, S70-TDI,