Quote:
Originally Posted by pjq
So, makes you wonder when your gas cap is asking for 97-98 and all you can give it is 91??? But the car seems to run ok. I'd really like to try the 97-98 to see if there is a difference.
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The 97-98 is measured in RON, whereas in North America we use AKI which is also labeled as R+M/2 on the station pumps. Basically, take RON and multiply by .95 and you'll get the approximate AKI number. 98 RON = 93 AKI, 94 RON = 89 AKI, 92 RON = 87 AKI.
As far as I'm aware the 986 needs 95 RON as a minimum, which roughly correlates to our 91 AKI.
Also makes sense why most direct European engines need 91+ AKI to run right in North America, while NA-specific regular engines are designed to run 87+ AKI. My E320 specifies premium, as does my housemate's Mini Cooper.