Biodiesel is not vegetable oil.
Biodiesel is not vegetable oil diluted with solvents, i.e. diesel fuel or alcohols.
Biodiesel is not vegetable oil with “special additives” to make it run better.
Biodiesel is not vegetable oil refined through a conventional oil refinery process.
Biodiesel is not vegetable oil refined through thermal depolymerization (renewable diesel).
Biodiesel is not a fuel that requires costly modifications to your diesel engine (straight vegetable oil).
Biodiesel is not crude methyl esters which have not been refined or minimally refined.