Engine Oil

Hi,
Would straight 50 be ok for an engine?
Or what would one recommend?
Regards,
John
Reply to
jdungan100
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What sort of engine is it for?
Reply to
John
Depends on the application.
If its for an enclosed engine with oil in a sump that gets hot it might be OK as it will thin with increased temp, however if its for drip fed bearings, it might be a bit thick (unless the engine is a big un).
The manual for my R-H 1HR - 6HP open crank with drip fed mains specifies straight SAE20.
Reply to
skiprat
Hi ,
Its for a Crossley 1040 .
Im not too sure how hot the crankcase gets as i havent ran it for more than a half hour at a time. Thanks for the replys so far .
John
Reply to
jdungan100
If like my Bradford assume hot. Martin
Reply to
campingstoveman
Probably shouldn't, but I tend to chuck Wilkinsons 20W50 in just about everything four stroke!
Reply to
Nick H
My Crossley 1075 barely breaks into a sweat & only by keeping the pot covered can I get as high as 80oC .
I use modern cheap multigrades in old engine applications without a qualm - far better than the oils they were constructed to survive!
IMHO, SAE 50 will be too thick unless the engine is working hard on a summer's day.
Regards,
J. Kim Siddorn,
Reply to
Kim Siddorn

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