Waste Cooking Oil For Sale I Would Like To Know Whats The Best Way To Filter Waste Vegetable/Cooking Oil To Use As Fuel For My Diesel Car?

I would like to know whats the best way to filter Waste Vegetable/Cooking oil to use as fuel for my diesel car? - waste cooking oil for sale

I need to bring to the boil and filter the best way to clean black oil residue Vegetable Restaurant