Personally I sell a Pro Multi mix oil which is synthetic that is spec for engines running 50:1 to 16:1 fuel mixes. I haven't seen anything coming into my shop that uses 16:1 in the last 12 yrs but I have old Homelite chainsaws in my customer that uses this fuel oil mix without problems. That is a lot better than when I ran these saws as a teenager. I lost numerous PNCs using the older 25:1 fuel oil mix ratio. I got expensive cutting firewood for a living as several time during the season I was having to rebuild my saws.
