Though more expensive to produce, requiring a $0.33/litre Federal subsidy, a 2006 report found it would likely save at least $27 million per year when the social and health costs of petrol-sniffing were taken into account.
Typical unleaded petrol contains 25% aromatics, such as toluene, ortho-xylene and para-xylene. In contrast, Opal contains only 5% aromatics, which means that it has less of the toluene and other solvents which produce the intoxication (or "high") that inhalant users are seeking. The Australian Government subsidizes Opal's provision and restricts traditional unleaded petrol in some remote communities. According to BP, the lower volatile component in Opal means that cars using it are less prone to vapor lock.
Prior to the introduction of Opal, Comgas (a brand of the aviation fuel avgas) has been used in many communities to discourage use of fuel as an inhalant. Unlike Opal, however, Comgas contains tetraethyllead (TEL), a substance that is poisonous and is banned throughout most of the world for automobile use after the discovery that it was creating an increase in lead particles over the entire earth, including the poles.
- SUBMISSION TO THE SENATE COMMUNITY AFFAIRS REFERENCES COMMITTEE BY BP AUSTRALIA PTY LTD Parliament of Australia Web Site. Retrieved 2007-06-08.
- "Unsniffable fuel roll-out crucial, says report". ABC News Online. 14 March 2006. Archived from the original on 14 March 2006.
- "Opal fuel leads to 70pc drop in petrol sniffing". ABC News Online (Australian Broadcasting Corporation). 24 June 2010. Retrieved 24 June 2010.
- Opal fuel BP p.l.c. Retrieved 2007-06-08.
- Manufacturer site
- Can new non-toxic products eliminate petrol sniffing behaviours in remote Indigenous communities? (PDF) Brett Badger, BA, RMIT University, June 2005 (large bibliography)