Quote:
Originally Posted by FRSBRZGT86FAN
Japan has some high octane fuels Japan uses 89 and 96 RON and US gasoline is usually equivalent to 92 RON and the max in the U.S. is like 95 RON, and Super plus or premium like fuel there can be 100 octane which they sell sometimes as "high octane" on labels and what not. I don't remember hopefully someone else can clarify this better, but I'm pretty sure Japan has higher octane fuel and no ethanol.
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In Japan, regular = 90-91 and high octane = 100.
BUT
How they measure is different from how U.S. measures.
U.S. 87 is similar to JP 91
U.S. 89 is similar to JP 95
U.S. 91-93 is similar to JP 98-100
So, if you look at their numbers and our numbers, it looks like their gas have higher octanes, but they really aren't.