Quote:
Originally Posted by themnmd
USA, in California 91 max octane. I use Shell or Chevron. Occasionally I go to Sonoma raceway and get some race gas
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91 in USA is the premium petrol ( gas to you) .
We use RON (Research Octane Number) to measure octane
USA uses the average between RON and MON. (Research Octane Number)
Our 98 RON is about 92 in USA.