[/B]Warning-----please please please investigate the cost of doing the veggie conversion on your direct injection verses the cost of making biodiesel. Veggie requires you to stop and start the truck on reg dez or bio and have a seperate heated tank. You can turn 100 gal of used veg with 10 gal of racing fuel into 100 gal of 100 percent biodiesel and 10 gal of glycerin ( soap) A simple home brew requires a couple of barrels and an old waterheater on all the instructions are online..3 hrs equals 38 to 55 gallons in a small system..and you can sell it to your friends for .70 to 1.00