Technically Bio-Diesel fuel is Bio-diesel is the name for a 'variety' of ester-based oxygenated fuels made with vegetable oils or animal fats. Bio-diesel is a blended fuel, being blended in any ratio with petroleum based diesel fuels. The use of straight vegetable oil is different from using bio-diesel fuels as there are no additives. Funnily enough, bio-diesel is being pushed big time in the NT – that is another story.
Indybike: The setup that I have been talking about is very simple. With the fitting of a dedicated tank that is positioned accessibly and with a 'coarse' filter on it; either within the tank or external. The mate I have referred to uses a simple cotton sheet (bag) method (to get the chips out of his oil as early as possible). The tank has a heater pipe running within it, but around the edges so to heat the oil as the motor warms up using diesel. A separate line runs from this tank, via a solenoid / switch, into the standard fuel line; through its own secondary filter.
The vehicle is started using diesel hence warming the system up sufficiently, which can be achieved in a few minutes. Then the driver switches the solenoid over to vege oil and allows that thru the system. As a rule, before shutting the motor down, we have always run diesel back thru it. I have done many kms with this vehicle - a 6 y/old diesel hilux and have had no issues; nor has the owner. Religiously sticking to the warm up / shut down procedure and replacing filters at 5000 km on the dot.
Additionally, I have an uncle that had a very similar method which he used whilst he was alive. Neither have had any issues with waxing or the like (well no more than any other diesel fuel). Using oil from a fish and chip shop has been well and truly worth it.
I hope this helps.

