[Laser Bob]

I'm evaluating the three fuel options that are available to me, and want to get some opinions from those with experience and knowledge on what is the best. (of course 93 octane ethanol free is best, but I can't find it around here).

1) 93 octane with ethanol
2) 90 octane ethanol free
3) 90 octane ethanol free with 1 bottle STP octane booster per fill up

Thanks

 

[ERP]

No to option 3. Those 'octane boosters' will only raise a full tank by ~0.1 octane.