Higher octane fuels could become available in the future

[JFP in PA]

Originally Posted by Deserion

I think that the article could be better written. We're pretty much running the same gas in Europe and North America, in general. The author says Europe has higher octane - yes, but that's because it's measured differently. Europe posts the RON (Research Octane Number), while North America posts AKI (R+M)/2 (Anti-Knock Index [RON+MON]/2).

98 RON = 93 AKI
95 RON = 91 AKI
91 RON = 87 AKI

So in the last paragraph, there is no actual difference in actuality. The GM engineer doesn't state which method is used in mentioning 114 octane (likely RON, I would guess). I run 93 AKI in my Porsches.

Motortrend rarely get anything correct; nothing new here..........

[BER]

We used to be able to get 94 octane at Sunoco stations, but I have not seen it for a couple years.

My local airport will dispense 100 octane Avgas into 5 gallon metal cans. Cost is $4.75/gallon.

I don't do it often, but I will occasionally mix the 100 octane Avgas with 93 octane pump premium in my 3.2 Carrera Sport and it runs like a scalded cat! Have not tried the mix in my Boxster yet, but I will soon.

[AZ986S]

Originally Posted by BER

We used to be able to get 94 octane at Sunoco stations, but I have not seen it for a couple years.

My local airport will dispense 100 octane Avgas into 5 gallon metal cans. Cost is $4.75/gallon.

I don't do it often, but I will occasionally mix the 100 octane Avgas with 93 octane pump premium in my 3.2 Carrera Sport and it runs like a scalded cat! Have not tried the mix in my Boxster yet, but I will soon.

$4.75 is much cheaper than $8.50 I pay for the 100 Octane unleaded I get for track events. I believe the 100LL Avgas still contains some lead though, so I wouldn't use it.