WVO to diesel ratio

I wanted to verify someinformation that I got from an associate and fellow 300D mercedes owner.
My associate says that he gets his 100% vegetable oil from a Goldebn Pantry Convenience store that sells alot of fried chicken and potato wedges.
He says that he simply filters the used grease through a 5 micron filter and into his fuel tank.
Is this possible and is there a certain ratio of diesel that should be in the tank to guarentee that the car will start freely and will run efficiently?

Reply to this post

Enter the characters shown in the image.