2-Stroke Oil Question

Discussion in 'Lawn Mowing' started by steve45, May 4, 2006.

  1. steve45

    steve45 LawnSite Bronze Member
    Messages: 1,325

    Just purchased a Stihl stick edger yesterday. I read the manual last night and found that it specifically says not to use 2-stroke oil intended for watercraft, which I keep on hand. TCW & BIA approved oils are to be avoided, as are oils approved for both air & water cooled engines. Anybody know why? Are the air-cooled engine temps too high for these oils?

    Also noticed that this engine requires 89 octane gas. Wish everything used the same stuff...
  2. T.E.

    T.E. LawnSite Senior Member
    Messages: 799

    I don't know all the paticulars on the oil, but there is a difference. Just use the 2 cycle oil for trimmers, and you'll be fine. I also just 87 octane, and have never had a problem.
  3. Richard Martin

    Richard Martin LawnSite Fanatic
    Messages: 14,699

    You've already answered your own question. Water cooled engine run far, far cooler than air cooled and require a different oil. Of course someone's going to chime in about how they've been using TC-W3 oil with no problems but it's not something I want to do to my expensive 2 stroke equipment.

    Just use 89 and mix it with Amsoil at 80:1 and you'll have one gas for all of your 2 stroke machines.
  4. ThirdDay

    ThirdDay LawnSite Senior Member
    Messages: 442

    Echo Power Blend oil and 89 octane gas is all that we use now. We experimented with several different oils and gas but this works the best for us.

    Do NOT use 87 octane in ANY hand held product from ANY manufacturer!
  5. newz7151

    newz7151 LawnSite Silver Member
    from Tejas
    Messages: 2,419

    Unless it's like a Ryobi,or Poulan, or Homelite or something... no need to waste the extra money on expensive gas for those.
  6. JTF40

    JTF40 LawnSite Senior Member
    Messages: 875

    I have/do own Stihl, Redmax, Makita(Robin), and McCulloch - I have been using 87 octane for 20+ years and NEVER a problem.

    Also, Opti2 2-cycle oil is my choice for over 10 years. JMO.....:usflag:

    NCSERVICE LawnSite Member
    Messages: 206

    exactly, the outboard oil ran in air cooled two strokes is disastrous, the oil does not burn correctly and builds up under the rings, exhaust port, it also breaks down faster.
  8. lawnspecialties

    lawnspecialties LawnSite Silver Member
    Messages: 2,524

    Ditto here on the Opti-2 and 87 octane. I have a five year old BC2300 RedMax trimmer I use every day. Never had a single bit of engine work, yet. :weightlifter:
  9. imograss

    imograss LawnSite Senior Member
    Messages: 796

    I also use 87 and Opti2, no engine failures in the 5 years I've used Opti2.
  10. Tanaka

    Tanaka Inactive
    Messages: 1,084

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