There is no question, REAL GAS (made without corn-based ethanol) is far better for ANY seldom used internal combustion engine. To linger longer than four months begins to erode many fuel systems. Some have had better luck with longer time frames. But the word LUCK is not to be dismissed lightly.
In fact, it is so much better to use REAL GAS, that the State of California makes it a criminal offense to use it on any public roadway. Also in California, it is not available for public dispensing (via Gas Stations, etc.) into any motor vehicle. Like any hard core drug, one must sign an affidavit that you will NOT use this 'environment-killing' chemical on any public roadway in California.
I remember those famous words "I'm from the Government . . . . and I am here to help you . . ."
So, here in California, if one were to clandestinely put REAL GAS into one's Ford Model A (or ANY other vehicle) and drive it on any public road, one would instantly become a criminal.
Additionally, here in California, when REAL GAS is purchased it costs anywhere from 50 to 100% MORE than the State promoted Ethanol 'Corn Gas'.