Has anyone seen this issue? I was mixing gas using Stihl's oil mix for a gallon. After emptying the orange bottle, I noticed a bit of sediment in the bottom corners of the bottle. I put some gas in and shook it until it dissolved. I mixed it with the gallon. My concern is, what settled out of the oil maybe an important component of the lubricant. Let me add this oil has been around a long time. I bought a lot of this years ago, and only mix up 5, 6 gallons a year. I 'm about out so I will see if fresh oil has this issue.