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    What's the recommended fuel mix ratio determined by?

    Optimol appears to still be around. Back in the day the lore was that you could throw in some straight gas and finish your race without nuking your engine. Because of eutechting? Note I called it lore :) I used it briefly. Somewheres about then marketing speak made the new term ashless...
  2. B

    What's the recommended fuel mix ratio determined by?

    Oil anecdotes. Had an 81 yz125 whose factory service manual called for 24:1 on Yamalube 2 and 16:1 on Yamalube R. Clearly different oils. Fast forward to the 90's and Optimol at 100:1 was the fad. One weekend I mixed up my gallons to cc math and ran 80 something to 1 and smoked out everyone...
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