Perhaps not. In many of the Outback Aboriginal communities petrol sniffing has become quite a problem amongst the young, with devastating results. To combat this many communities have outlawed Unleaded and the old Super petrol. This means that you can only buy Diesel or Avgas. Avgas doesn't have many of the aromatics that the sniffers get high on, but it does have an octane rating of 110/130 and double lead content
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This means that modern petrol engined cars and 4wds have all sorts of catalyst and oxygen sensor problems and explains the popularity of diesel 4wds for outback touring. It also explains the popularity of events like "Back to the Track 2005" where we get to travel the desert tracks on Avgas and not have to worry about fuel additives
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