This is a topic that usually results in lots of response... all have opinions(!)...
Get hold of a Briggs and Stratton one cylinder workshopmanual. Mine have part.no. 271313-12/00 but that is in Swedish.
Read the small section on oil/lubrication/service. It is the best presentation of an answer to your question that I have ever seen or heard
I like and prefer Omega Lubrication - special oils for heavy duty machinery. "pay through the nose" prices mind you...
Magna Industrial Co. Limited click on Omega.
[url=http://www.smorjteknik.se]Distribut
(and once again is my reply cut short as it is published... this is getting annoying!...)
The text I did write contained these data:
757 15W/40 for temps less than 35/40'C.
757 20W/50 for temps that goes higher than 35/40'C
690 80W/90 in the transmission.
Quaker State 20W/50 and 75W/90 mineral is an option to me.
Am running:
http://www.biltema.se/sv/Bilvard/Olj...torolja-5W501/
...and that is a cheap fully synthetic oil... I do not like synthetic nor semi-synthetic oils... I planned to flush my R80 engine, still not gotten around to finnish the flushing...
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Drive Safely,
Albert
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