Originally Posted by pee vee
oilman
a couple of questions
Working temp for oils in an engine, would that be between 80 and 100 degrees?
also
am i right in thinking, a SAE 60 oil is 70% thicker than a SAE 40 oil
at a temp of 100 degrees
So making a SAE50 oil Approximatly 35% thicker than a 40 at 100 degrees??
Surely in Real terms, you would see huge difference between them?
as in to actually look at your oil pressure gauge when up to temp
you would notice a big difference between them??
thanks!
Hi,
Yes, between 80-100 degc is optimum... a lot of people now are over cooling with their oil coolers and not going above 50-60deg.... this can be as bad as over heating the oil depending on what grade you are using.
You are quite correct about the viscosity at 100deg. However when it comes to watching the pressure guage you also have to take into account the faster flow rate of the thinner oil... the idea being the faster the oil circulates the quikcer it can cool but will read as quite low oil pressure as the pressure is a measure of resistance and not flow.
Cheers
Simon.