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Old 06-10-2004, 07:58 AM
rusted rusted is offline
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Default Compressor oil

What is a good analogue for it? I couldn't find any last night. What could I use instead that would be as good as or better?

I was thinking Mobile1 engine oil would have a lot of extra detergents and stuff I don't need. Would that hurt it? The lubbing would be excellent I would think.
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Old 06-10-2004, 08:35 AM
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Default Atf

Automatic Transmission Fluid is the best alternative if you can not find air compressor oil. Do not use engine oil!!!

Compressors can vary widely with what the manufacturer recommends. I will assume you are running a 1 or 2 stage reciprocating (piston) type compressor with a maximum rated pressure of 200 psi or less.

The only weakness ATF will have in a compressor is it inability to handle water contamination. It the ATF gets cloudy or hazy that is a sign of water contamination. Change the fluid and you will be fine.

The McMaster-Carr carries the product I use. It is a low viscosity synthetic. I leave my compressor on all the time and it gets cold in my shop during the winters, hence my need for a low viscosity product. If you don't have temperature issues use the viscosity grade closest you what your mfg recommends. If you need help selecting and converting viscosities and viscosity grade let me know I will be happy to help.

It is an excellent ester based synthetic.

www.mcmaster.com Part # 1411K11

PS I have been employed in the Industrial Lubrication Field since 1991 and I am a Chemist by degree. I also carry the Certified Lubrication Specialist accredidation by the Society of Tribologists & Lubication Engineers.

http://www.stle.org/cls/cls.htm
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Last edited by Shade Tree Welder; 06-10-2004 at 08:47 AM. Reason: spelling
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Old 06-10-2004, 08:53 AM
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i don't know what type or model compressure you have ...but i got a 1953 I.R....and it has always had straight 30 weight non- detergent used in it ...and it has never been rebuilt and don't need to be..synthetic oil is good to use if it sets in a cold shop do to the flowabiliy of synthetic at low temps
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Old 06-10-2004, 09:11 AM
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I Really like synthetics. But any 40 wt machine oil will do. Aw 150 grade. in a pinch 40 wt "Non detergent" motor oil will do.
I use Ams-oil in mine, and I used to recommend it to customers.
ATF will keep moisture in suspension. In machine oils the moisture will settle out to the bottom of the "sump". I don't think I'd ever use it.
Here's a link to Ams-oil
http://www.thebestoil.com/filtration.htm
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Old 06-10-2004, 09:19 AM
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ams oil is the best stuff i've ever used ...got a 1984 lincoln and it is ams-oil from end to end and always has been after she got 10,000....she has over 100,000 on it and had a friend slip a bore scope in a spark plug hole ....he started to giggle and i got worried ....he said hell it looks like new in there ....yeah it costs some but i feel you make it up in only changeing oil once ayear....also like it cuz i'm lazy
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Old 06-10-2004, 09:29 AM
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Thirty wt on an older, slow running compressor works good. These days most of the small home shops have "consumer grade" compressors with 3450 motors. They run faster than "ArcDawg chasin women"!, and get hotter than Franz talking about Chuckie and Joey jr.
The extra viscosity helps with the heat.
I run Ams-oil in all my vehicles and equipment.
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Old 06-10-2004, 09:43 AM
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I just installed a new CH Quad 4 compressor, the manual for it specs:

"single-viscosity, ISO 100, non-detergent compressor oil." "Mobil 1 5W30 or 10W30 synthetic oil may also be used."

I used the Mobil 1 cause it was easier to find, I have wondered about the break-in though. I may just change it out for the compressor oil, at least for the first couple of years use.
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Old 06-10-2004, 12:26 PM
rusted rusted is offline
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Quote:
Originally Posted by Paychk
I just installed a new CH Quad 4 compressor, the manual for it specs:

"single-viscosity, ISO 100, non-detergent compressor oil." "Mobil 1 5W30 or 10W30 synthetic oil may also be used."

I used the Mobil 1 cause it was easier to find, I have wondered about the break-in though. I may just change it out for the compressor oil, at least for the first couple of years use.
That's very interesting. How long have you had it that way?

Thanks for the responses!

Here are pics of my little cleanup project. Almost done today, bending copper and mounting the extension brackets.

Air
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Old 06-10-2004, 12:38 PM
rusted rusted is offline
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Quote:
Originally Posted by Shade Tree Welder
Automatic Transmission Fluid is the best alternative if you can not find air compressor oil. Do not use engine oil!!!
Why not? Does it keep moisture in suspension as well?

The oil I took out of there looked like milkshake. But, the compressor itself looked brand new inside.
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Old 06-10-2004, 12:59 PM
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Quote:
Originally Posted by rusted
That's very interesting. How long have you had it that way?
Just over a week, I've only really completed the break-in (1 hour run with tank venting through the drain). I haven't had time to use it yet, cleaning up the storm damage, hope to put it in use this weekend.
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