the products we already use for cooking can be used to fuel a car... after using cooking oil for food... we can use it in a autombile... so there will be no starvation, in essence, most boidiesels, are a buyproduct of consumed foods...... therefore the last thing we will be doing is starving... in fact we would be well fed.

any cooking oil, used or new, could be burnt in a diesel engine, Motor oil used or new can be burnt in a diesel engine, it does not matter, with the right modifications, may i add, not many, and a diesel engine can run on cooking, motor oil, used or freshly refined and or made.