Archie wrote:

 During one of my seminars, indicated how quickly oil darkens
 due to combustion by-product contamination in conventional
 aircraft piston engines.
 Does the group, or anyone, have approximate information
 regarding this relative to the Wankel, or specifically to the
 Mazda rotary?

 Archie Frangoudis,
 Archie's Racing Service

Ken Welter wrote:

   It don't get dirty at all, after 100 hrs my oil looks like new as
there is no where to blow by.
  Another cool thing is the oil level never drops as it gets fuller
[due to excess apex seal two cycle oil draining down].
You have to worry about draining the excess oil out rather than
running out of oil.

   Ken

 
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