Octane Question

[speedfreak]

Looking for some advise. I have 1997 Johnson 35hp 2 stroke 3 cylinder that is sitting at 180 psi compression. It will turn 6700 - 6800 RPM's. It's been tuned to run on 100 LL avgas mixing amsoil 32:1. My question is, as a contingency plan, if I was ever in a situation where I was out of 100LL and couldn't get it, in a pinch could I use Boostane Octane booster with 93 octane pump gas and not hurt the engine? Obviously, mix it at a ratio to get it to 100 octane. If so, should I over shoot to 102 octane???? Should I use pump 93 Octane with ethanol (since 93 non-ethanol is almost impossible to find in my area) or use a 91 non-ethanol (it is plentiful). Thanks in advance. Hopefully I'll never have to go this route.

[Dannand]

You should be good to go using Boostane with 93 octane pump gas to hit that 100 octane mark. Just follow the mixing instructions, and you might want to go a little higher to 102 if it eases your mind.
As for the fuel, I’d suggest sticking with the 91 non-ethanol if it’s readily available. Ethanol can cause problems, especially if you’re not using the engine regularly. I’ve had my share of fuel issues, and avoiding ethanol has saved me some headaches.

[speedfreak]

Thank You. I think if I ever have to use pump gas in an emergency, I'll use Boostane to get the 91 non-ethanol up to 102.