A quick hello

From Swansea, I was introduced to this forum by a fellow member of another forum, who suggested that by starting to use biodiesel, I stood a chance of rotting the rubber in the fuel system of my "mature" (1994) Disco 2.5TDI.
So I have come on here to pick the brains of you experienced "alternative users", as to what I should be using? at what %? & where do I get it? not a lot to ask for an introductory question!
blueskip

Yer mates talkin bollix.
Just by some Veg oil from cash n carry and bung it in the tank. You'll get away with 75% this time of year, but drop back to 50% in the winter.

Change yer fuel filter after the first couple of tank fulls and then a bit more often than you would normally.