If you are determined to make your own biodiesel at home, you want to make sure that you have the appropriate biodiesel equipment. You can actually purchase a full biodiesel kit. Typically, the companies that sell the biodiesel kits,you will also be able to purchase lye and methonal, which are two of the key components of actually making the biodiesel fuel. Because the main ingredient in biodiesel fuel is vegetable oil, the home biodiesel kits are made so that you can just keep recycling your used vegetable oil. By purchasing a biodiesel kit, you will be saving up to $3 a gallon, which is just another reason why they can benefit you.