Yes, real fuel is worth it. Only a few cents higher where I live, worth every penny in bikes, small engines, my Ranger, the C10, the C60 bucket truck and the old John Deere 1020UL gas burner.

My 98 Ranger with over 208K miles on it gets 21-23 mpg on blended gas, well over 30 on straight gas. I got close to 160 miles out of a 5 gallon can.

My Savage on blended fuel, pre-apehangers, got in the high 50s, on straight gas it got in the mid 70s miles per gallon. With the apehangers, 36 mpg on blended, 42 on straight gas.

I've read that in smaller engines it can make a big difference in the longevity of the engine with fewer problems, but first hand I can't say either way.  

Here's a good read:  http://zfacts.com/p/436.html

Basically, gallon for gallon ethanol has 2/3 the amount of energy as pure gasoline.  Also, ethanol holds up to 22% of it's weight in water.  Between the energy reduction and the potential added water, you can see your fuel efficiency drop an easy couple of MPG.

If I had pure dino juice around here, I'd buy it every chance I got.

Then GO,, fill up & Haul some home...

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In the same marketing region, I would expect that both gasoline labelled as E-10 or "may contain up to 10% ethanol" are likely to contain ethanol.  So that might be why you don't see a difference.  The tax credit for ethanol (among other legislative reasons, Google "renewable fuel standard") provide a good incentive generally to put ethanol into the final fuel.  There has been much talk of late of increasing ethanol in gasoline to 15%, despite data that shows damage to some cars and small engines at the higher levels.

I've been dodging ethanol gas for awhile, now. I haul mower, chainsaw, and weed eater gas from non-ethanol stations. But I run anything in the Savage as long as it's good stuff with the exceotion of times when it will be parked a while. At most places around here the difference in price is supposed to be a wash between the low price of ethanol and the better mileage of non-ethanol. I messed up and put in some ethanol Shell from my usual place before surgery. After about six weeks with a half tank I took her out and got some actual carb backfire. I knew immediately what it was and tooled on home. I can see my fuel filter while riding, and it was completely black for the first time in two years. New filter, new fuel line (5/16') and fresh gas set her right. Took her up to 85 just for fun. She's baaack. (I put the bad gas in my truck)