I can`t find the previous thread I started.
A fellow OSO member sent me his octane tester and I tested the different gas combinations .
Here are the results:
Control , taken out of my gas can .. 89 octane

Gas out of the Cigarette from last year :

Treated with a octane booster and left open to atmosphere.

Same gas treated with AMSOIL fuel stabilizer , left open to atmospehere.

Same gas treated with marine stabil. Closed bottle

Same gas non treated closed :

Fresh Gas from Nor-tech treated with BOOSTANE. Full bottle to 60 gallons.. Im not sure what the numbers mean exactly but seems like 97 octane?

Same fresh gas from Nor-Tech with 50% boostane.. I expected higher octane so not sure whats going on there .

What I walked away with :
Using fuel stabilizer will prevent phase seperation but lowers octane.
93 octane treated with boostane and not any fuel stabilizer will not lose octane over a years time.
Boostane seems to be working except the 50/50 test should be higher but it may be too much boostane and the machine can`t read the octane .. I dunno.

Was this summer gasoline?

If so, it is not surprising that octane increases with age, as the higher octane toluene will evaporate less than the lower octane components.

97 RON and 92 pump octane (average of RON and MON).

In the US, the gas station will show pump octane, while in most of the world, it will show RON.