Wed Aug 12, 2015 3:30 am by gt1cooper
There was 100, 101, and sometimes 102 octane fuels in the US in the 60's/early 70's. But these weren't RON rated, these were AKI rated, so there is a big difference between the 93.1 octane available in game. One thing to understand though is that these ones weren't using the R+M/2 rating system, so in reality they were closer to 95-96.
However, they were widely available. Hess had 101 octane almost everywhere, Sunoco 260 had 102 octane, both leaded and available past 1975, since it was only new cars that required unleaded. Not much past 75, since that was the death toll for these fuels, but they were around for sure. Ford Boss 429's had 100 octane as basically a requirement. Nowadays, Sunoco still offers 110 octane fuel, and not too uncommonly, it's just VERY expensive.