To me the "freshness" if that's a word is far more important than the octane. I say that as my sled only requires 87, if it needed 91-93 I would look for both. Next time you’re up riding take a look at what the locals are putting in their vehicles. Regular would be my bet, so to me the freshest fuel would be the Reg. We actually asked the attendant what the most used fuel was at the station, regular is was again. They said probably three times that of Premium. Run what you want to I’ll stick with Reg. Now for my cans at home and for storage purposes I will get premium at the gas station by my house, since more premium is used here at home I figure it’s more likely to be fresh. I also put Amsoil Stabilizer in the cans as well.