Here premium is only 91 octane. I like it. I like it even better if it is the non ethanol 91. I still use some kind of fuel stabilizer. It does not seem to hurt and I think helps. I use Stabil, Briggs, MTD, about any kind. Stabil the last two years. The old timers here all use Seafoam. I do not know what kind of guys miss spell fuel. I do know what kind of guys make a big deal of it.