I contacted Shell Australia to determine our (Australian) equivalent octane compared to yours (USA). I received some results that may assist with mapping.
As you most likely know Australia use the RON octane rating and you use AKI.
The conversion is:
(RON + MON) / 2 = AKI
In Australia we have two high-end premium grades of fuel available:
- 98 RON
- 100 RON (includes 5% ethanol)
So, using Shell’s information, I have calculated the following ratings:
Shell V-Power
98: (98 RON + 85 MON) / 2 =
91.5 AKI
Shell V-Power Race
100: (100 RON + 89 MON) / 2 =
94.5 AKI
Note: Shell V-Power 98 is far more available than the V-Power Race 100 octane grade.
Cheers.
CaptOz