Biodiesel: Production, Benefits, and Uses

Hi everyone,

Lately, diesel has also been quite expensive; I've even seen it priced at 97 cents per liter.
Does anyone know what needs to be changed on an Audi TDI B4, model year 1994, to be able to run on biodiesel?


Hi TDI-Seppl,

Try using the search function! If you've read all of this, you'll surely choose to stay with Dino-Diesel voluntarily!

tdi-seppl wrote:

...does anyone know what needs to be changed on an Audi TDI B4, model year 1994, to be able to run on biodiesel?

- Fuel injection pump.
- Fuel lines
- possibly also the tank (even if it's made of plastic).

All plastic parts react quite uniquely to biodiesel. Dissolution may occur.
"The fuel injection pumps were modified for the 1996 model year so that at least the seals are compatible with biodiesel. However, since Bosch does not provide any approvals for biodiesel, I would definitely avoid using it. As far as I remember, inductive rotary variable geometry (RWG) was not used in the pumps up to 1995, and therefore the resistance sensor could also cause problems with biodiesel."