2 cycle oil and gas

Discussion in 'Homeowner Assistance Forum' started by iceberger, Apr 7, 2005.

  1. iceberger

    iceberger LawnSite Member
    Messages: 23

    I just bought a Stihl HS-45 hedge trimmer. A sign on the wall said to use 93 octane gas in all 2 cycle engines. I've never heard this before. Is there a value in using this higher octane gas? Also, what is the best 2 cycle oil to use in the mix?
  2. marko

    marko LawnSite Senior Member
    Messages: 963

    If Stihl makes oil, I would use it. The manual calls for 89 octane. Here is the link. Check under fuel. It states that if mid grade is lower than 89(R+M/2) use premium.
  3. rbeitz

    rbeitz LawnSite Member
    Messages: 138

    I have always used 87 octane with my Stihl trimmer and never had a problem. I also use the Stihl branded oil and mix at 50:1.
  4. grass_cuttin_fool

    grass_cuttin_fool LawnSite Gold Member
    Messages: 3,526

    I use 87 octane and stihl and ''no smoke'' oil and have had good sucess, I have the hs45 trimmer also

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