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new to me stihl Fs 90 R. Gas/oil ratio to use?

Discussion in 'Lawn Mowing' started by olebrooklawn, May 5, 2011.

  1. olebrooklawn

    olebrooklawn LawnSite Member
    Messages: 225

    thanks sam
  2. White Gardens

    White Gardens LawnSite Fanatic
    Messages: 6,776

    Just go get some Opti-2, or Amsoil 2 cycle mix and take the guess work out of it.

    Either of those two brands will allow you to mix at their recommended rate for all equipment, thus no separate cans for different machines.
  3. FLAhaulboy

    FLAhaulboy LawnSite Senior Member
    Messages: 852

    50 to 1 ratio using 93 octane gas.
  4. gebby

    gebby LawnSite Senior Member
    Messages: 712

    Use stihl oil. Buy them by the size the store has. The very small one will do 1 gal and the next size up will make 2 gals. Your dealer will appreciate and he can't say the problem is the wrong oil or mix if there is a problem. No guessing. As suggested alway's use high test gas.
  5. knox gsl

    knox gsl LawnSite Fanatic
    Messages: 6,164

    That's what I use with Stihl oil.
  6. Richard Martin

    Richard Martin LawnSite Fanatic
    Messages: 14,699

    You're going to get a lot of opinions on this and here's mine. I've been using Amsoil mixed at 80:1 with name brand mid grade gas for a decade now. I've had ZERO oil related problems with any of my 2 stroke or 4 Mix tools. I have a bunch of them too with the huge majority being Stihl.
  7. LaLawnGuy

    LaLawnGuy LawnSite Member
    Messages: 222

    i use the stihl HP Ultra and love it, buy it by the case from the dealer and the cost goes waaaay doen, or did for me. Btw, do you know Tim or Adam Gordon there in B'haven?
  8. GMLC

    GMLC LawnSite Platinum Member
    Messages: 4,345

    Stihl HP Ultra oil at 50:1 with 93 octane. The Stihl HP Ultra oil already has fuel stabilizer in it!!
  9. BestImpressions99

    BestImpressions99 LawnSite Senior Member
    Messages: 491

    Agree that using the Amisol or the Opti-2 is the best idea. Costs $70 for a gallon, but you don't have 3 different cans to worry about.
  10. olebrooklawn

    olebrooklawn LawnSite Member
    Messages: 225

    No I don't know them. I got a dumb question? Do I need to use 4 stroke oil instead of 2 stroke?
    Posted via Mobile Device

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