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 - Usin Your Implements: Bucket Loader - by Curtis Von Fange. Introduction: Dad was raised during the depression years of the thirties. As a kid he worked part time on a farm in Kansas doing many of the manual chores. Some of the more successful farmers of that day had a new time saving device called a tractor. It increased the farm productivity and, in general, made life easier because more work could be done with this 'mechanical beast'. My dad dreamed that some day he would have his own tractor with every implement he could get. When he rea
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