RC:
Whoopsy:

Cause we wrote the posts at the same time but you posted a tad earlier than me haha

Porsche spec-ed 93 octane here in North American using the measuring method here. that that works out to be around 95? Using the European rating?

I think 96 but I'm not so sure. I learned something about 3 points difference between the US and European octane rating but still not sure about it.

AKI (US) to RON (EU) conversions can't be done as a straight conversion, like °F to °C because you really need to know MON to calculate AKI as the average of the 2 values -- (RON+MON)/2.

But, you can get rough values as

  • AKI = RON * .955
  • RON = AKI * 1.048

So, for example, 100 RON ~ 95.5 AKI and 93 AKI ~ 97.5 RON