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One man's exploration of diesel to vegetable oil conversion... and proving it can be done!

What is LPG?

3296 Days
of trouble-free motoring on veg oil since converting on 18th June 2008

LPG stands for Liquefied petroleum Gas (also called LPG, LP Gas, or autogas). Wikipedia defines it as "a mixture of hydrocarbon gases used as a fuel in heating appliances and vehicles, and increasingly replacing chlorofluorocarbons as an aerosol propellant and a refrigerant to reduce damage to the ozone layer."

LPG is a byproduct of the petroleum industry and is manufactured during the refining of crude oil, or extracted from oil or gas streams as they emerge from the ground. So whilst LPG does produce around 20% less emissions than standard diesel and petrol powered engines, it's still very much a fossil fuel.

I'm not knocking anyone who chooses to use LPG. It's price alone (unusually less than half the price of petrol at the pump) is enough of a bonus, and 20% less emissions is still a good result. Unfortunately LPG can only be used on Petrol engines (not diesel) after a conversion process, so it's no good for my car.

Biodiesel, Vegetable Oil or LPG?

There's no real comparison as Biodiesel and Vegetable OIl run in diesel engines and LPG runs in Petrol engines. If, however, we were to ignore this rather blatant fact and compare purely fiscal and environmental factors, how would it look?

LPG
Biodiesel
Veg OIl
Fuel Cost
Least expensive
Slightly cheaper than standard diesel
Cheaper than Biodiesel
Sustainable
No
Yes
Yes
Fossil Fuel Content
Most of it
A small part
None
Emissions
20% than standard petrol engine, but still high
Some, but better than diesel
Few, the best of the bunch

So you can see, as a green fuel LPG is sort of okay... it's not necessarily good, but it's not as bad as an average petrol engine.

Useful LPG Links

If you've got a petrol engine in your vehicle and want to save money and do a bit of good for the environment, then give serious consideration to a LPG Conversion. Here's a few links that might help.

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