Gas shelf life

['68OrangeSunshine]

I live in Tucson, AZ. I have about a dozen old school steel jerry cans. I buy in bulk at the end of the month using my *Fry's VIP points when I can get a Dollar a gallon off the pump price, with a 35 gallon limit. Most jerry cans are not used immediately so I spike them with STA-BIL fuel stabilizer. Two oz per 5 gallon can.
The manufacturer states you can store fuel for two years using their product. I've only found a can that old, that I skipped from rotation once or twice, but the gas burned OK.
I put a piece of green gaff tape near the neck of the can, and mark the Date/Brand/Octane Rating/Price/and Sta-Bil if added.
Unstabilized gas can be mixed with fresh gas if you have the empty jerrycans to play.

[* Fry's is in the Kroger network, including Smith's. Fred Meyer and others.]