fuel octane question

[kev535i]

having just taken delivery of my EAT chip-very impressed so far- im confused about the different octane rating systems, here in Aust we have 92 ron = unleaded 95 ron = premium unleaded and 98ron = super premium unleaded but i notice these numbers are different in US what are your comparison numbers or is their some easy formula to translate
http://www.users.bigpond.com/kevinfishing/beach.jpg

[Torque]

There is a formula, but I honesly don't know it off the top of my head.

Approximate values off the top of my head:
AUS --- USA
92 -------85-87
95--------87-89
98--------91-93

[uscharalph]

having just taken delivery of my EAT chip-very impressed so far- im confused about the different octane rating systems, here in Aust we have 92 ron = unleaded 95 ron = premium unleaded and 98ron = super premium unleaded but i notice these numbers are different in US what are your comparison numbers or is their some easy formula to translate
http://www.users.bigpond.com/kevinfishing/beach.jpg
Basically, just use the highest octane fuel.

[uscharalph]

having just taken delivery of my EAT chip-very impressed so far- im confused about the different octane rating systems, here in Aust we have 92 ron = unleaded 95 ron = premium unleaded and 98ron = super premium unleaded but i notice these numbers are different in US what are your comparison numbers or is their some easy formula to translate
http://www.users.bigpond.com/kevinfishing/beach.jpg
Very clean '88 Kev!!

[Bill R.]

Aus. uses Ron numbers..
87 AKI = 92 ron
91 AKI = 95 ron
94 AKI = 98 ron







having just taken delivery of my EAT chip-very impressed so far- im confused about the different octane rating systems, here in Aust we have 92 ron = unleaded 95 ron = premium unleaded and 98ron = super premium unleaded but i notice these numbers are different in US what are your comparison numbers or is their some easy formula to translate
http://www.users.bigpond.com/kevinfishing/beach.jpg