I hear various things about effects of WVO & Biodiesel on fuel lines. How significant are the effects? Is there a place where the varying effects are posted? Viton I hear is the material of choice.. but it is $13+/ft, and I don't think I can get it locally. Tygon (F4040A) is much cheaper $2-4/ft and lots of places carry it. But I have not seen a report about its use with Biofuel.

I have the rear tank out of my truck installed a HotFox, I was thinking of just using standard rubber fuel lines.. but started thinking about the hassel of having to replace the fuel line to the tank again.. I really dont want to be pulling that tank again if I can help it.

How about getting seals for the injection lines for older engines. If I buy a kit will it still be made with OE material?