Wow, that's just insane! Does not the Australian government set standards for 100LL? It would either appear not, or that any standards that may exist are not sufficiently strict.
From the
21 Oct 2019 AHIA report executive summary:
"Examining the history of avgas supply to aviation operators in the northern parts of Australia, it was evident that over recent years, manufacturers had reduced the absolute levels of tetraethyl lead (TEL) in the avgas product, from historical levels of around 0.75 gPb/l in 2012, to around 0.38 gPb/l in 2018. To maintain the fuel’s Motor Octane Number for defence against damaging detonative combustion, other fuel chemistry variations would be expected – typically an increase in the level of aromatic hydrocarbon components. Data to support explicit conclusions in this area was not available to this investigation, with the manufacturer citing commercial sensitivity concerns."
Will the Australian piston helicopter customer community be able to vote with their wallets, or are they just buying 100/130 from the same idiots who are taking liberties with the formulation of 100LL? Is 100/130 more expensive?