Quote:
Originally Posted by supracat
Hi mate,
i noticed you quoting 91 octane - are US octane readings on a par with UK??? - if so, it seems a big difference as i was expecting to the UK GTR to require 98 octane at least! - are US cars effectively 'detuned' to run on 91?, OR..............., am i being thick somewhere????
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Different ratings - UK is RON; US is RON+MON/2.
US 91 is comparable to UK 95.
Phil