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      08-30-2012, 12:44 PM   #11
int2str
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Drives: 2008 135i
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Quote:
Originally Posted by JasonCSU View Post
Man, such high octane ratings. Do those ratings compare with ours in the US? The highest octane we can get here in Colorado is 91, and we have no choice on the ethanol front, all of our fuel contains 10% ethanol. I think the highest rating I've seen in the US is 95 excluding the race fuel few stations have.
No, they don't compare. Europe uses the "ROZ" standard while the US generally uses the "RM/2"

98 ROZ (Europe) is about 93 RM/2 (US)
Though there is no fixed conversion factor.
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