Richard Smith wrote:
"Pete C." writes:

Joe AutoDrill wrote:

Also, there's nothing special about compressor oil--the
overwhelming majority will be perfectly happy with straight 30 wt
non-detergent just like is used in lawnmowers etc, just don't use
the wrong weight ( or a multi viscosity oil ) because the oil
distribution system is based upon known oil properties as well as
crankshaft speed.

...My big 3-phase monster takes Mobil-1 10W-30 Synthetic. Which
Dayton charges $29 per quart for or something like that.

You can't imagine how ****ed off I was when the UPS package showed
up with my compressor oil and it was Mobil-1 off the shelf of the
auto parts store at that price...

Ouch. Mobil-1 is definitely good oil though, I use it in most
everything.

I've heard compressor-oil is low-ash and - well, something to do with
compressors have a high "compression ratio" and can make a mess of
ordinary engine oil - or even run as a diesel engine combusting the
wrong crankcase oil.

I dunno about that , but I've seen piston rings that were so carboned up
that they couldn't seal properly . That was in a pump that as run way harder
than the rated duty cycle though .

--
Snag
Learning keeps
you young !