Hi Everyone,
As many already know, I found it necessary to design a breather system for the new edition Whizzer motors. All WC-1, NE, and SE [what I call the Ambassador motor because the serial number contains "SE"]. Problem on WC-1 is passages too small to allow crankcase venting, and on the NE & SE, a large hole [.475"] allows massive amounts of oil stuck in the lifter cavity, and quickly fills the vent tube, causing the free flow of oil. I know for a fact [because of actual testing] that synthetic oil "foams". And adding "foaming" oil to the equasion reduces the chances of good crankcase ventilation.
It isn't necessary to be a rocket scientist to understand that in order to reduce the oil blowing out the vent system the pressure must be reduced somewhere in the system. To me "foaming" oil is similar to shaking a Coke [or Pepsi, or whatever], and increases the pressure, and as "foam" it is easier to push out the vent hose than liquid oil. Also remember the Whizzer motors [all vintage & new edition] use the "slinger" [dasher, dipper,etc] system, and therefore the rod works like a high speed blender, so oil that doesn't foam is a must in this type of motor.
So my advice remains the same, use straight 40 Weight oil, and no matter what remember, I have actually tested these concepts.
I will still test the 40 weight synthetic later [when it is warmer] to see if it foams, but mainly because I want to know what happens. I will gladly share the results here.
Have fun,