What is LPG ?

Liquefied Petroleum Gas (LPG) is a by-product of the petroleum-refining industry and in the UK the definition covers both commercial propane and commercial butane. When put under a relatively low pressure, these gases turn to liquid and can then be stored easily in a variety of tanks. This is in contrast to other road-fuel gases like CNG (Compressed Natural Gas) and LNG (Liquefied Natural Gas), which either have to be cooled to extremely low temperatures (LNG) or put under very high pressures (CNG) to be stored.

With our system, LPG is expelled in liquid form under its own pressure from the tank through special piping to a pressure reducer (sometimes called a vaporiser). Here it is reduced to normal pressure and changes back into a gas. It then travels to a computer-controlled valve that regulates how much gas is introduced to the engine.

The truck's own ECU recognises that extra power is coming from somewhere and regulates the diesel injection to compensate. The end result is that your truck will run on about 75-80% diesel and the remainder will be LPG. You will actually use more fuel in total (as gas has less energy per litre) but since LPG is about 30% the price of diesel, a saving of 10-15% is made.