Stihl 034 oil gas mix

I have an 034AV Super. The owner's manual (21 years old) recommends 50:1 if you use Stihl-brand oil, 25:1 if you use a different brand. There have been lots of advances in oil over the last 20 years, I use a different brand of oil and I never run it richer than 40:1. A good rule of thumb: your engine (they didn't make 034's after 1993) should only smoke a tiiiiiny bit when warm. If it smokes more, than you're running it too rich.