EDIT: ^^^yup
Biodiesel is grease that you treat with chemicals to convert to BIODIESEL
WVO cars run 2 fuel tanks, one diesel one just veggie oil, when the car is up to temp (veggie oil is up to temp also) you swith from diesel to grease, same thing when you shut it down
my friend has a car and a truck he has been running on wvo for over a year, he also has 2 250 gallon holding tanks, and a gas station pump sticking out of his house. Hes is letting me use his grease for free
once the kit is in I will buy biodiesel for the main tank (again from my friend) and grease in the rear tank for free