Well there is a difference in fuel quality and Arizona is well known for its arid climate too unlike here in the east where 90% humidity is common. Alcohol loves water and attracts it like a magnet. SeaFoam will NOT help with alcohol. In fact, it actually contains a high percentage of alcohol. I repair machines on a regular basis because of alcohol/water damage.Not sure how factual that statement is, the only gas I can get here is Az has a 10% blend. I have been running my 2002 Trail Boss with it for 17 years. Sometimes it sits for 6 months or more before I take it out for a ride again. This Quad has better than 5000 miles or more on it and its still 100% original except for tires and batteries. The carb has never been replaced or overhauled. It will fire up and idle just fine every time. I do buy good gas, like Chevron or Shell and its always the 87 octane but ethanol has not hurt mine at all.n Just my .02 worth :winkEthanol blended fuel is ok if it is all you can get. Not great if you aren't not gonna use is all right away. Shelf life is limited before it starts to do harm to the fuel system. Adding some SeaFoam to it can help. Then when you get done for the day, drain the carb to limit the damage.4 .
There appears to be some limited amounts of alcohol-free fuel available in Arizona according to the real gas websites... Here's a link to one.