Originally Posted by Pre '68 Dave
The 10w30 oil should actually be thicker then straight 30w when warm

That's a popular misconception that just keeps getting repeated. Multi-weight oils do not get physically thicker as they heat up- - - - -the additives in them just let them lubricate like thicker oil. Try draining some hot 10W-30 sometime and run it through a viscosity measuring cup- - - -it flows exactly as fast as cold 10 weight. I've done it numerous times.
Jerry

Last edited by Hotrod Lincoln; 04/29/2014 5:56 PM.
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