Bottom Line: Almost any diesel engine car can go biodiesel with little or no modifications.
Almost any diesel car can run on biodiesel without major modifications. Biodiesel is a clean burning alternative fuel produced from domestic, renewable resources. Biodiesel contains no petroleum, but it can be blended at any level with petroleum diesel to create a biodiesel blend. These blends are sold using a system called the "B factor," which denotes the percentage of biodiesel contained within a petrol/bio mix. Biodiesel is simple to use, biodegradable, nontoxic, and essentially free of sulfur and aromatics.
Only diesel engines can run on biodiesel. All engines that run on #2 diesel can also be run on biodiesel. This means, home furnaces, generators, half-trucks, homestead tools, fishing boats, etc.