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Range of Gas/Oil Mix Ratios for Old and New 2 Cycle Engines

Discussion in 'Mechanic and Repair' started by Thinker, Feb 1, 2007.

  1. Thinker

    Thinker LawnSite Member
    Posts: 16

    Anyone have an idea of the range of Mix Ratios Used in Old and New 2 Cycle Engines running today? I have Citgo oil bottle showing the ratios from 16:1 to 50:1, and I know the synthetic oils run at 100:1. 50:1 seems to be the standard ratio for newer engines, while 16:1 is might be a thing of the passed since the engines are so old and the oil is better today. The next lowest ratio I have is an email from Stihl saying if you don't use their brand oil to use 25:1, rather than 50:1 . Echo claims you can use 50:1 in all engines using their brand oil.
  2. carcrz

    carcrz LawnSite Silver Member
    Posts: 2,085

    Stihl & Redmax are set @ 50:1
  3. kkls2006

    kkls2006 LawnSite Member
    Posts: 141

    I put 50:1 in everything.... Including my mowers, maybe thats why they don't run so well????:confused: :confused:
  4. Oldtimer

    Oldtimer LawnSite Bronze Member
    Posts: 1,458

    I've been using mixed fuel in my mowers since 1983. It seems to work ok.


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