Volkswagen is the only maker currently making diesel passenger cars for the Canadian market. Therefore, if you are looking for a new car to burn your biodiesel in, VW is the only manufacturer available.
VW only approves of the use of B5 Biodiesel in the TDI vehicles.
For more information see:
http://www.vw.com/vwcom/content/objects/pdf/service_maint/BIODIESEL_ENG.pdf