Washington, DC Area. The AKI values I listed is (RON+MON)/2. So AKI = USA = (RON+MON)/2. I’ll use USA for ease.
I’ll also use E[nn] nomenclature to specify the ethanol content in percentage (eg: E10 = 10% ethanol)
The unleaded options available to me in terms of ease of acquiring between me and the tracks are:
Premium pump gas 93 USA, E10
Sunoco
• Optima 95 USA, E0
• 260GTX 98 USA, E0
• 260GT 100 USA, E10
• 260GT Plus 105 USA, E13
VP
• C20 97.5 USA, E0
I went with 260GTX 98 USA, E0 since it has no ethanol, is easy for me to get, comes out of some Sunoco pumps, and there are others running it successfully in 2Ts in the USA per this thread:
If I can tune it to run well on pump 93 USA E10, then I may just use that. It’s the 98 RON / 93 USA as suggested by IAME, and literally 15-20% of the price of the race gas pails.