On Wed, 06 Oct 2004 10:03:11 -0400, trainfan1
wrote:


Multigrade oils do not "thicken up" when they get hot, hotter, or really
hot. You can demonstrate this in your kitchen today with a quart of
your favorite 10W-40 and a candy thermometer.

This has been a source of endless debates between my friends and i. I
think most people understand multi-viscosity oils on some level, it's
just the terms are confusing. As long as you get that even though the
viscosity rating of a multi-weight oil increases as it gets warmer,
both straight and multi-viscosity oils are actually "thinner" when hot
you've got it.