What is WVO

Vegetable oils have fuel properties that are similar to diesel fuel, except they have lower oxidative stability and greater viscosity. These vegetable oils may substitute for traditional diesel fuel if these differences are managed away. It may be used as a substitute for petrodiesel or heating oil.


For diesel engines, we must lower the viscosity of vegetable oils so that it is atomised properly, otherwise we will have carbon build up in the engine from incomplete combustion. There are two sources of vegetable oil:

Straight vegetable oil, which comes straight from taking the vegetable oils out of plants.

Waste vegetable oil, which comes as a by-product from restaurants and food manufacturers who no longer need the vegetable oil for cooking or manufacturing food. If you offer to take it away from restaurants, they may give it to you for free.

Vegetable oils still need to be filtered properly and water removed. You can do this at home with a series of tanks and filters. Additional stages of filters will get more particles out of the vegetable oil that can damage your engine. As well as filtering at home, it is recommended to add another stage of fuel filters in your vehicle and regularly check their status.

To remove water, it’s as simple as draining the water out from the bottom of a tank. When vegetable oil and water is in the one container, the vegetable oil will form a layer on top of the water. You can see where there is separation between the vegetable oil and the water that has accumulated.

All vegetable oil naturally has water in it, but you might get additional water from condensation in fuel containers. If you are storing vegetable oil for long periods, please check that water hasn’t accumulated in the storage tank before you fill your engine’s vegetable oil tank for it to run on.