Fuel schemes provide credits and grants to reduce the costs of some fuels or to provide a benefit to encourage the recycling of waste oils.

http://www.ato.gov.au...

http://www.ato.gov.au/businesses/pathway.asp?pc=001/003/044&mfp=001/003&mnu=9955#001_003_044

From 1 July 2011 the LPG Vehicle Scheme will be capped at 25,000 eligible claims paid in a year (1 July to 30 June) for the duration of the scheme to 30 June 2014. The grant amount for LPG conversions completed between 1 July 2011 and 30 June 2012 is $1,250.

http://www.ausindustry.gov.au...

http://www.ausindustry.gov.au/EnergyandFuels/LPGVehicleScheme/Pages/home.aspx