LPG powered vehicles

Liquid Petroleum Gas (LPG) emits less carbon dioxide than petrol, it can cut your fuel bill by up to a third. Before you commence vehicle fuel system modifications, such as LPG conversion, you may require approval from the Department.

  Getting your vehicle modified

Find out what modifications you can undertake to a light vehicle in Western Australia without approval from the Department, and what to do when approval is required.

  LPG cylinder inspections

Australian standards require LPG containers to be inspected and tested every 10 years by a licensed auto gas fitter. The test expiry date showing the month and year is stamped on the gas container. Out of date gas containers must not be filled until tested and re-stamped at a certified test station.

If the 10 year certification period will expire before the next regular vehicle service, arrangements should be made for the gas container to be re-inspected and re-stamped at a certified gas cylinder test station as soon as possible.

  LPG identifiers

The Road Traffic (Vehicles) Regulations 2014 requires the owners of LPG vehicles to display a special label fixed to the front and rear number plates that is:

  • Made of durable material; and
  • At least 25 mm wide and 25 mm high; and
  • Reflective red conforming to AS 1742-1975 Manual of Uniform Traffic Control Devices, Appendix C, Class 2; and
  • Marked 'LPGAS' or 'LPG', or with words or acronyms to similar effect, in capital letters at least 6 mm high.


If the vehicle is powered by dual fuel (LPG and petrol or diesel) then only one label per number plate is required. However if the vehicle has more than one LPG tank installed (sole fuel source is LPG), then two labels are required per number plate.

Replacement LPG identifiers can be purchased from auto gas fitters.


Fuel watch logo

FuelWatch, a part of the Department of Mines, Industry Regulation and Safety, is the only service in Australia which gives motorists the opportunity to access tomorrow's fuel prices today.

It is legislatively empowered to provide price transparency and knowledge of fuel prices in both the wholesale and retail industry sectors.

At absolutely no cost, fuel price information is available via FuelWatch's web page, personalised email service and media reports; and by using our phone service for the price of a local phone call, wherever you are in WA.

Opens in a new window Department of Mines, Industry Regulation and Safety: FuelWatch


Page last updated: Thu Jan 18 2018 1:41:07 PM