Am in Muskogee, OK just now.  Saw Phillips 66 station advertising no alcohol in premium gas.  I would think that any phillips 66 station would have the same fuel as any other.  Am I mistaken here?

here is my 3cents, when I had my 86 883 I use mobil 93 all the time ran great. then bought a 87 fxlr custom lowrider and ran the same mobil 93 to this day I still have both bikes, one with 69k on sporty, 42k on fxlr.
Just a year ago I bought the fatboy lo and from day one sunoco 92, along with amsoil 20-50. so running 91-93 grade of gas will not hurt your bike harley's, other bikes not sure some of them call for lower octane.

All I'll add at this point is that it does take compression to ignite octane and lower compression bikes will not burn high octane fuels and the end result is like raw fuel blowing right out you're exhaust. Heavier oils do increase compression and if the oil is too heavy you sacrafice lubrication. So if your going one weight higher in oil you may notice an increase in power if you have higher octane than needed.

Also, in cold climates you're better with the lowest octane the bike will handle with adequate performance in that the lower the octane the higher the burning temp (btu).

If the OEM says that the best octane for your bike is this or that then use it. You can go one octane higher if you're riding two up. The issue isn't with octane, the issue is with additives the oil companies put in the gas. In the northeast stick with SUNOCO no matter what the grade, you shouldn't go higher than what you actually need, and be assured the right additives are in it for the geographic area you're in. Citgo is another story, they allow the dealers to order the additives they want in the gas and most dealers won't spend for better fuel. You're fuel economy takes a dive and they make more $$$ from their discount gas sales then you could imagine with all the additional fillups you'll need.

Now then, immisions plays a major role in what OEM's reccomemd for octane. They reccommend 91 for my bike and I've used 92 & 93 octane gas and really found very little difference, if any, in fuel economy. Since I have a high mileage bike with a minimal amount of ring and barrel wear, never the less enough to drop compression, I use 87 and have no major problems. Sure, as a bike loses compression you do lose power, however, mine just keeps on pulling. I use my unique blend of oil and it really works quite well keeping wear at the trivial level. Soon, I'll be over 100K and then I'll really take a look at the performance issue and give everyone some feedback.

All in all, don't by cheap gas. Stick with the major brands and you'll do alright.

Gas!!!! The best gas for your motorcycle is any gas without the ethanol! Most gasoline on the market today has 89 octane fuel advertised as marine fuel that has NO ethanol. Ethanol, if not used within 30 days, starts to break down. Water seperates from the alcohol (ethanol) and starts to ruin your entire fuel system. Put a fuel stabilizer in your fuel if your bike will sit for mare than 30 days. I can tell you of many problems associated with ethanol for those who are interested.