The fact that you're able to use eight year old gas doesn't mean the fuel stabilizer did anything. It just means you were lucky. I started my '92 Seville, which had four year old (untreated) gas in it, and it ran just fine. (It had a seized air conditioning compressor, and it sat for several years before I got around to figuring out why it wouldn't crank.) I was just lucky.
Now, if you have a SEALED container, gas will last a long time. But it has to be sealed well enough to be able to hold the vapor pressure of the fuel, which is typically several PSI. Also, fuel in certain parts of the country (such as California) is required to have a low vapor pressure, and that stuff in theory should last longer.
Stabil and other fuel stabilizers don't disclose how their products work. But it's safe to say they can't lower vapor pressure. And as long as the fuel's vapor pressure is higher than atmospheric pressure, you're going to have evaporation in any vented tank. And evaporation equals degradation.
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Today's Featured Article - Harvestin Hay: The Early Years (Part 2) - by Pat Browning. The summer of 1950 was the start of a new era in farming for our family. I was thirteen, and Kathy (my oldest sister) was seven. At this age, I believed tractor farming was the only way, hot stuff -- and given a chance I probably would have used the tractor, Dad's first, a 1936 Model "A" John Deere, to go bring in the cows! And I think Dad was ready for some automation too. And so it was that we acquired a good, used J. I. Case, wire tie hay baler. In addition to a person to drive th
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