To Group, I previously asked about break-in oil, got no responses.
So, if I don’t hear otherwise, I will use straight 30W oil for the
first 3-5 hours then switch to Mobile One synthetic, maybe 20W-50W.
Thanks. Frank clementi
Rotary engines do not require break in. Stick with Mobile one or
Idemitsu rotary engine oil. Mix 2 cycle oil with the fuel one ounce
per gallon.
Paul Lamar
French users of Citroen GS Birotor were advised using
Total 20W50 Mineral Oil, and they reported good results with it,
as synthetic oils seem producing more ashes and gums, below
please find a comment in 'Rotativement votre', a French forum on RCEs,
Google translate always gives acceptable translations into English,
but in translating for example, Spanish into Dutch, the system is much
less accurate, I suppose you're aware of the anecdote of one of the
first automatic translation computers ever tested, it was given the
sentence: 'The Spirit is strong, but the flesh is weak', translated
into Russian
and back, the back translation said: 'Vodka is good, but Goulash is
inedible'
SAE papers 730048, by R D Behling and E Weise; 740160, by Jh du
Jeu and B Brandone;
840237, by Marcel Gutman; 890212, by C Kappos and S Rajan.
All deal with fuel and lubricants' issues of Wankel RCEs.
For Air Cooled engines, Shell Rotella 30 was said the best, and
the contemporary Aixro engines,
charge cooled rotor and liquid cooled housings, use Mobil 1 Racing 2T.
Typically, the top housing temperature, with an Aluminum housing,
at full open throttle,
5000 rpm, in the NSU Spider Single Rotor Engine was 300º F [150º C]
(SAE paper 650722, W Froede)
and 500º F [260º C] in the plug region of housing for a 120 cc
Yanmar Diesel air cooled engine
(SAE paper 720466, K Yamaoka and H Tado).
I suppose more data are available in the editions of the book on
Wankel engines by K Yamamoto
published by Mazda in 1969, 1971 and 1981, some are available for
download in the web.
Have a good weekend. Best regards.
Salut † Jose Gros-Aymerich, Madrid, Spain
Mobile 1 and Idemitsu form no ashes and or gums. Minerla oil breaks
down at 250 F
Mobile 1 is good to 500 F.
Paul Lamar
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