What's the practical upper operational limit to how much 2-stroke oil
   can be added to the fuel and still have reliable operation?  Options I
   can think of:

    - Eventually you'll have so much oil it fouls the plugs (unlikely?).
    - Eventually you'll have so much oil it lowers the effective octane
   rating of the fuel (unlikely?) to the point of detonation/preignition.
    - Eventually you'll have so much oil it lowers the power output such
   that it won't make takeoff power.
    - You can't have too much 2-stroke oil - it'll run on 1:1.

   Is the upper limit so far above how much you'll ever accidentally put in
   the tank so as to not be a factor?  I am envisioning accidentally
   adding
   the 2-stroke oil twice - doubling the mix ratio.  Probably not a concern
   - just curious.

   Side question: How long will it run if you forget to put any into a load
   of fuel?  Would there be any way to detect this condition?  Will your
   fuel calibration be off enough to detect it (assuming capacitive
   sensors).


   Regards,

   Matt-

   Jim Mederer reports up to four ounces per gallon does not hurt.
   George Graham flew from Tennessee to upstate NY forgetting to put oil
   in the fuel. Engine continued to run for dozens of hours. Engine
   never failed up until he died from cancer this year.
   --
   Paul Lamar ...No rotor no motor.


Sometimes if it does not fully mix on a cross country I will get a bolus
of oil and the engine will notably sag for a few seconds.

If you regularly use too much your engine oil pan will overfill with
2-stroke oil.  Regularly use too little and you seals will wear out too
soon.  But in general there is a wide range of acceptable ratios.

Detonation is an issue only if you are on the ragged edge.

1 - 1.5 oz/gal seems about right, less for the renisis.