Fuel Mixture 2 stroke oil

Discussion in '2-Stroke Engines' started by darwin, May 23, 2012.

  1. darwin

    darwin Well-Known Member

    I don't have alot of experience with 2 strokes on mabs. Tanaka says 50:1 with their brand of oil. Does that ratio apply to any brand of 2 stroke oil, say brand x from wallyworld?

  2. Fabian

    Fabian Well-Known Member

    Best to use the search function on the site for information to your question, because oil ratio is an age old debate.
  3. darwin

    darwin Well-Known Member

    Maybe I didn't phrase the ? right. I plan on sticking to the recommended ratio but are 2 stroke oils concentrations different? Say with tanakas brand you use 50:1 but with brand x you would use a different ratio to = the tanaka brand oil........stupid ? maybe but with alot of products the ratio can change with a different brand.
  4. tom-fishing

    tom-fishing Member

    I'm no oil guru, but I've found that every oil brand has a different recommended ratio. And on top of that every engine manufacturer has its own ratio to use. At one time I had 5 different gas/oil mixes, in the end I found one brand to use in all the 2 cycle engines. There are some good threads on here about the different oils, look for them in the 2 stroke section.
  5. Fabian

    Fabian Well-Known Member

    At 50:1 you will need the engine to be jetted rich and to use an oil made specifically for an air cooled engine; designed to run at 50:1, without the engine being excessively laboured, especially at low speeds and rev's kept below 5,000

    At 32:1 you can get away with any kind of 2-stroke engine oil so long as the engine is jetted slightly rich and not pushed too hard, i.e. revs kept below 5,000 and not laboured hard at low speeds.

    At 25:1 you can get away with any kind of 2-stroke engine oil, at whatever revs you choose and at any bicycle speed in any temperature conditions, so long as the bike is jetted correctly.

    At 16:1 you can get away with any kind of oil, even vegetable oil so long as the engine is not jetted lean. The downside is that it will carbon up the internals and exhaust and spark plug. If desperate to get home and out of 2-stroke oil, 16:1 will work with any oil you can find.

    At 100:1 you will need the very best 2-stroke oil designed for an air cooled engine with everything working perfectly and the bike to be operated in a gentle manner without being pushed at all - also absolutely no air leaks; a carburettor that is jetted rich and a good fuel filter for any fuel restriction will lean out the mixture and it's bye, bye to the engine.
    Last edited: May 24, 2012