Quote:
Originally Posted by Kiske
Keep in mind that Japan also runs a higher octane fuel (98-100) for their premium unleaded gas than most of the west readily offers.
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Just a note, Japan uses the RON method of measuring octane. The US uses AKI ((RON+MON)/2).
93 AKI = 98 RON
91 AKI = 96 RON
E85 is 94-96 AKI = 102-105 RON
So if you live in a place that has 93 octane gas, the difference between what you have at the pumps and the best pump gas in Japan is minimal. And if you have access to E85, you have even higher octane available at the pumps.