Hello Mr Paul Lamar. I want some information about oil property (and
also the oil already use ) for aircraft rotary engine. in google I do
not find something and in a website I see your newsletter. please
help me if you can Thank you Mahdi Barjasteh

For the oil sump we recommend Mobil 1 or Idemitsu rotary engine oil.
For the apex seals we recommend mixing one ounce of two cycle oil
with each gallon of gasoline.

4 litres is about one gallon US so 1 ounce liquid US is about 30 cc
in the French system :)

30/4 is 7.5 so 7.5 cc per litre will work fine.

Paul Lamar


I'd say that an additional possibility exists of putting 1 cc of
LiquiMoly (MoS2) for every liter of fuel, that's what the producers
of this Molybdenum Di-sulphide say, and the attached chart from the
book by E McGovern points to a reduced wear when leaded gasoline was
employed, Lead acting as a solid lubricant, MoS2 is also a solid
lubricant, and thus, same good results can be expected with MoS2
additives, LiquiMoly or Molykote, as those detected with the
fortunately no longer existent leaded gasolines. Best regards.

Salut †     Jose Gros-AymerichMadrid, Spain

I am not rich enough by a factor of 10 million to try a new apex seal
  lubrication. I would have to be near unconscious to try something
that dumb :)

2.5 million Mazda engines have been sold using oil to lube the apex
seals.

IT IS NOT BROKE!!!!!!!! However YOU are free to try it. Let us know
how it works.

Paul Lamar


Hi Paul: I've just reviewed the SAE paper 922375 I downloaded in
your www.rotaryeng.net
     site,  about lubrication in the Mazda 24 hr Le Mans competition,
and it points that
mixing an organic Molybdenum compound in oil/fuel will improve
fuel economy by
     1.5%, and will also protect the metal in bearings, so the conceptof
MoS2 added to oil was tested and proved good, the question remains
     on whether the LiquiMoly additive, to be put 1cc per liter of
gasoline oil-mix
     is the right one, I ignore if it's an: 'organic Molybdenum
additive', but
    perhaps somebody knows about it.
 Thanks for your attention, have a good season, best regards, +
salut
    Jose Gros-Aymerich
    E-28033 Madrid, Spain

The apex seal oil cools the apex seal as well. This is absolutely
essential. Might not hurt to add it to the 2 cycle cooling oil.

Paul Lamar

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