[Kenny Wigington]

Manny, I have no real answer why, but twice, I have checked C 11, that was bought late the previous season, and it passed both times. I keep mine in the dark blue jugs almost always. I have an O ring in the top of the cap on one. I did buy some 12, 4 yrs ago, and it failed right out of the can ! Carried it right back, swapped it for 11 and no more since then.
I did buy some 11 last yr that caused all kinds of problems though.... It killed a pump, and regulator, and gunked up the carb,and ate the inside of the lines, so after swapping out the whole deal, it has been fine since.