A good lesson in oil viscosities etc.

budgel, Jul 30, 9:53pm

marte, Jul 31, 1:49pm
Thanks, that's cleared up the 'Oils thicker when it's hot' statement that I have been wondering about a lot lately.

It isn't.

And, go higher on the upper number.

gph1961, Jul 31, 4:16pm
good watch

fishb8, Jul 31, 4:31pm
👍

orphic1, Jul 31, 6:10pm
Informative, thanks

bumfacingdown, Dec 16, 1:08am
"And, go higher on the upper number"
Why?
Would the manufacturer not know what grade was best?