I think all grades of gas around here have ethanol in them....
I have been running Startron fuel treatment in all my stuff which seems to help some.
Same here. ALL GRADES OF GASOLINE HAVE ETHANOL IN IT - IT IS A FEDERAL MANDATE NOW!! Even if the sticker on the pump appears to only be over the 87 unleaded handle, it doesn't matter. They all have that crap in it now. There used to be some gas stations left around if you hunted for them that had non-ethanol fuel still, but even they are all gone now. SUPPOSEDLY what I heard was that if you go to a marina that has fuel pumps at the docks that fuel is supposed to have no ethanol in it. But even that might have changed. Even if it is ethanol free though, it is a pain to go that far out of your way to go get it and it is also like $5 a gallon because of where it is. The only other place you can get ethanol free fuel is at your local race tracks if you go talk to the fuel man there. However, while it has no ethanol in it, you will find that 100 octane or so is about the lowest octane fuel you can buy there. Typically they sell the most of 110-115 octane leaded race fuel or some type of special racing alcohol for the alcohol fueled drag cars. As far as I know, that is about it. Plus, it is even more expensive at about $8-$10 per gallon!
If you have a 2-cycle engine, I have seen pre-mixed cans of fuel and oil that is also supposed to not have any ethanol in it. However, it is only in 30:1 or 40:1 or 50:1 fuel and oil ratios that I have seen, so you're not going to put that in your GT. It is also expensive and the little can they sell I don't think is even half a gallon.
I usually run 89 or 91 octane fuel (depending on where I go and what level of gas they sell. Sunoco is the only one I have ever seen that has 91 octane fuel.) with Startron fuel stabilizer in it. (It is pricey at about $10-$12 a bottle and I have only found it at NAPA.) I use it in everything, even my car and truck. Some have told me that it is just snake oil and not worth wasting the money on, but they sell a lot of it it seems... I haven't had any problems running it, but then again I haven't heard of anyone having issues just because they don't use it either... I have also been using some lead additive in the fuel for my Bolens 850 and my Ariens Sno-Thro. IDK if I need it or not, but they did have leaded fuel still in the late 1960's when they were both made. I had heard that these engines have hardened valve seats in them though, so leaded fuel isn't really necessary, but I'm not 100% sure on that either.
Edited by MailmAn, January 19, 2013 - 02:23 PM.