I have not had any trouble with old fuel either. I was about to throw away some Byron fuel from the 80's and a friend said why don't you try it. I did and it ran great. I burned 2.5 gallons of it with no problems. This was last year. This year I have used 10 gallons of other brands ranging from 2005, 2007, and 2011. The Bryon was kept in an unheated garage ranging from under freezing to over 100 degrees. The other was stored from 70 to 80 degrees. Since I can't get fuel locally, I store up when I can and use it when I get to fly.

I do keep it out of sunlight and keep the cap on except when connecting a fuel pump. All of the above was 10% nitro except for 2 gallons which were 5%. This has been working for me. Good luck on your decision.