The speed of my CPU fan goes down quite often.I lube
it with machine oil.It evaporates after 7 days and I have to relube it
again.
Can anyone suggest a solution?May be, I have to use abit heavy oil.
I want a practical tried-out clue.
Why did you use machine oil in the first place?
Don't ever use light oil to lube a fan, it is never a good
choice. Get a lint-free paper towel and soak up as much of
that as possible from the bearingway then lube it with VERY
heavy oil, almost grease but not straight grease.
80 wt gear oil will work, or specially formulated heavier
oils. You could even mix grease thoroughly with some medium
oil but the goal is always that it be VERY high viscosity.
Are you sure your CPU fan isn't being thermally controlled,
that it is definitely failing? I would suspect it's a lower
quality fan so I ask, what size (dimensions) is it? If the
metal portion of the sink can accept a quality fan, you
might replace the fan but if it uses a smaller thin fan you
might want to replace the entire heatsink-fan assembly
instead... with one starting out with a good fan even if it
means having to buy a good fan separately and throwing away
the original fan. Lots of lower-end to middle range
heatsinks have fairly poor fans on them, a decent fan should
last a decade. Shoot for lowest RPM and thickest fan
possible while still providing sufficient airflow to cool
the CPU.