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

Current program arrangements remain in place for LPG conversions and new LPG vehicle purchases completed on or before 30 June 2009. From 1 July 2009, there will be two different grants available subject to eligibility criteria.

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

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