100 octane
 

Anyone ever run 100 octane unleaded in there car mixed with 93?

No, it would be almost a pointless boost in octane numbers. You might as well either run e47, meth with 93, or straight 100.

I mixed 94 with 110 unleaded to get to around 100. It may not be necessary for my s256 as it was tuned for 94. I am doing this just as a safety measure. I can't get any E fuels were I live.

Pointless without having your tune set up for it. You might go faster due to your wallet being lighter thou

What he said.

There's no point running race fuel unless you're tuned for it. You'll actually run a wee bit slower because the fuel burns more slowly than a lower octane.