I have been thinking of going over to biodiesel now that I found a supplyer in my area but I have heard that the bio is not good for any of the seals in a engin and will cause leaks. I am not to worried about the fuel system because any leaks would be an easy fix but what about the injector orings on a 7.3 di motor?
I would consider replacing injector orings to be a lot of work. What about the fuel pump?

 

I think there are three posts on this same subject on the first page alone.

No and No