I couldn't help but go look at my last quart of Sig AA, given to me about 92, been down to +5 F. twice, opened 3years ago. No flakes smells good, ran in fuel last summer. The first quart was open when I got it and did develop some whiteflakes. After the fuel and oil was thoughly mixed at room temp I ran it through a coleman lantern funnel/felt filter got the chunks out ran fine.