How old is too old?

You can clean parts, pour it onto your garage floor, sweep it around then dump some kitty litter on it. Thats how I clean up oil or grease stains on the floor. I have some "bad gas" in 5 gallon cans in the garage that has saved me at least once. I found out that the gauge in the Dart is off by 1/4 tank and I ran out of gas in my driveway. I filtered some of this 4 year old brown, nasty gas into a small can with a tee shirt and dumped it in the Dart. It started up, ran smooth and got me to the gas station with no problems.