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About LPG -

What is LPG ?

Liquefied Petroleum Gas (LPG) is a natural hydrocarbon fuel made up of propane and butane. Under the normal atmospheric pressure it’s natural form is gaseous, but it has the special property of becoming liquid when under relatively low pressure. This allows for easy transportation and convenient storage – a big advantage over natural gas, which will only turn to liquid at extremely low temperatures. What’s more, LPG is 250 times denser as a liquid than as a gas mix. So, a lot of fuel can be stored in a relatively small space, for use almost

Chemical makeup

Commercial Propane predominantly consists of hydrocarbons containing three carbon atoms, mainly propane (C3H8):

Commercial Propane predominantly consists of hydrocarbons containing three carbon atoms, mainly propane (C3H8):

LPG is obtained as a by-product of the distillation of oil from crude oil and from "wet" North Sea gas. In the past, LPG has been considered as waste and flared off; now it is recognised as a major energy source and it is produced in large quantities. A surplus of approximately 4 million tonnes per annum is currently available from the North Sea alone. The surplus is forecast to increase over the next 20 years.

Auto Gas - car conversions

When used as automotive fuel LPG is often named Autogas.

With the modern LPG systems, autogas offers the same performance comparable to petrol, in top-end speed, acceleration, engine handling and refill times.

The distance traveled per litre of LPG is approximately 5% to 25% less than for petrol, owing to its lower volumetric energy density, but due to the much lower cost per litre, significant savings are achieved even compared with the latest diesels.

Compared to petrol, Autogas has a higher octane rating (RON). For example, Super grade petrol is 98 octane, ordinary Lead Free petrol is 95 octane. LPG is over 100 octane. This results in smooth burning and less wear to the engine. For more information on what are the benefits of LPG for the engine, please check our Why LPG ? section.

Specially made totally sealed strong steel LPG tanks are used to store Autogas in vehicles. It is pressurised (to approximately 7 bar) so it becomes a liquid and it is in this form it is pumped into the tank.


LPG can be found naturally, and the UK is Europe’s largest producer. It is particularly abundant in the North Sea’s ‘wet’ crude oil and offers security of fuel supply for many years.

The UK currently produces over 6 million tonnes per year of which around 3 million tonnes is exported. Only some 120,000 tonnes is used as automotive fuel. The rest is used for domestic or agricultural heating or in chemical or refinery operations.

There are substantial environmental and economic benefits of using this supply locally rather than exporting it. This will significantly reduce our reliance on expensive, imported petrol and diesel.

Nowadays, almost any refueling site in the UK and abroad has LPG supply, which enables a continuous availability of Autogas. For more information on refueling with LPG, please, see our Refueling section.

In conclusion, the availability of LPG not only provides security of fuel supply for many years but also a significant margin to increase use in the UK