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      08-15-2012, 08:58 PM   #7
3point0
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Drives: 2005 z4 3.0
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AFAIK Europe uses the RON octane rating system and in North America we use the AKI system. If my memory serves me right from when I used to live in the UK regular is 95 RON which is the equivalent to premium (91 AKI) over here.

just looked it up on wiki and it seems to be as I remembered:

http://en.wikipedia.org/wiki/Octane_rating
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