USE OF BIOFUEL IN A DISCOVERTY tdi XS

Discovery 1995 2500cc DTi
I would welcome some advice.
I have considered making biofuel and am happy with the chemistry washing and drying process but could you help me with the following:
1) Do I need the change the fuel lines and seals in the fuel pump?
2) What percentage of biofuel is advised or what additives to use
3) Are there any other considerations other than initially a few fuel filters

Any contructive help gratefully received

Do a search mate it's all in here many times over

Just use 100% dirty chip oil

na sod 100%, mix it with some diesel too help so it dont get clogged up

Many thanks for the replies. However I still cannot find a diffinative answer as to wether biofuels will harm the standard fuel pump rubber seals for the year. I have do several searches.

Any comments

The general concensus is that biodiesel or veg oil will be fine in a tdi but the jury is still out regarding td5's.