Can a conventional diesel engine run on biodiesel or must alterations be made?
The simple answer is yes, you can run any diesel engine on biodiesel without alteration. However, consult your mechanic on the quality of fuel lines and rubber seals in your engine. Biodiesel is a strong solvent. This is good because it cleans out carbon and sediment deposits in your engine, but bad because it can degrade poor-quality rubber seals and hoses.