Bearings...how they work.

[userfriendly]

If the oil entering the bearing cavity is warmed up
to operating temperature, the fluid friction in the
bearing should be lower than with cold oil.

The temperature rise of the lubricant during it's
duty cycle should also be less with the hot oil.

I always believed that a bearing design that
dissipated heat to the connecting rod or block,
would cause the bearing to run cooler, and
therefore more efficient.

There are likely bearing designs and journal
finishes that shed or retain oil.
Matte or gloss, take your pick.

In the quest for fuel efficiency, which would be
more beneficial in an automotive application....
A bearing design that retains heat or dissipates heat?

 

[userfriendly]

I think on another topic thread we agreed that a bearing design
that retains heat was the correct answer.