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Interesting , after research the UK uses RON (which stands for Research Octane Number) data and US uses MON (which stands for Motor Octane Number) data. RON is measured at low temperature and speed and MON is measured at high temperature and speed. This could be deceiving for anyone who buys racing fuels. Thanks for the insight.Our octane and their octane are apparently not actually the same octane.
Iirc, their 95 ~= our 89