IT IS TAXED HEAVILY HERE ANYWAY AS ARE ALL OUR FUELS , WE CANNOT BUY AV GAS/ 100 OCTANE FUEL WITHOUT A PERMIT, OR OWN AIRCRAFT AND THE COST IS RITE OFF , $2.00 PLUS A LITRE, , NORMAL HOUSE HOLD PROPANE IS NOT COMMERCIALLY AVAILABLE TO VEHICLES SO WE HAVE LPG ( LIQUID PETROLEUM GAS ) WHICH IS A MIX OF PROPANE/BUTANE , ITS EXTREMELY CHEAP TO PRODUCE AROUND 5C PER LITRE , WE BUY FROM THE SERVO AROUND 45/60 CENTS PER LITRE SO ITS OVER HALF THE COST OF GASOLINE( PETROL) EVERY SERVO IN OZ HAS LPG,THE GOVT HAS HUGE SALES TYPE TAX THEN THE GST TAX ON TOP SO THEY MAKE MORE FROM LPG SALES THAN THEY DO FROM PETROL, SO ITS HEAVILY PROMOTED HERE, ITS GREAT , SAFE, HIGH OCTANE ( 100/110)AND CHEAPER THAN PETROL, I CANT IMAGINE ANY COUNTRY NOT PROMOTING IT AS A SAFE ALTERNATE FUEL , BETTER THAN ETHANOL AND HYDROGEN ETC AND GREAT FOR THE ECO SYSTEM