Recent Topics
Another airliner vanished
by Vikas
03/28/15 11:26 AM
Oil recommendation for a 1965 Volvo 122S.
by andx0r
03/28/15 10:39 AM
Had the most fun on 2 wheels in a long time
by skyactiv
03/28/15 10:38 AM
Driving Instructor Prank
by montero1
03/28/15 10:11 AM
New Distributor - Any suggestions for good brand?
by Bama
03/28/15 09:51 AM
Home Depot oil prices on par w/WMart
by wemay
03/28/15 09:07 AM
Bulldog loves the leaf blower
by Stelth
03/28/15 08:54 AM
Ethanol and Carburetors
by Oldswagon
03/28/15 08:33 AM
Details on free Windows 10 offer
by Hokiefyd
03/28/15 08:26 AM
Pennzoil Question - Which is the Preferred Oil?
by Best F100
03/28/15 08:15 AM
Finding stock purchase price from 20 years ago ?
by Mr Nice
03/28/15 08:00 AM
[Cut Open] Harley Davidson Super Premium 5 (63798-99A)
by DuckRyder
03/28/15 07:25 AM
Newest Members
broncobuggy, bugracer, sour, Jettaman, Neuman
53345 Registered Users
Who's Online
82 registered (Al, 97tbird, anonobomber, 77GrandPrix, ArrestMeRedZ, 10 invisible), 2124 Guests and 172 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
53345 Members
66 Forums
228799 Topics
3656260 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Topic Options
#2025210 - 09/23/10 07:53 AM Air Compressor Oil
artbuc Offline


Registered: 12/02/05
Posts: 532
Loc: West Chester, PA
I have a 25 year old Sears oil lubricated air compressor with a 2HP electric motor. The Owners Manual says to use 20-20W SF oil in summer and 10W oil in winter. It says do NOT use multi-viscosity oil because it "will leave carbon deposits on critical components reducing performance and compressor life". Are modern multi-weight oils ok to use? Thanks.

Top
#2025227 - 09/23/10 08:25 AM Re: Air Compressor Oil [Re: artbuc]
Craig in Canada Offline


Registered: 04/06/06
Posts: 1995
Loc: Toronto-ish, Canada
My 5 y/o CH compressor said similar things about most motor oils "except Mobil 1"

I chose to use an Amsoil compressor oil in the end as it's directly suited to purpose and one bottle will last me a very, very long time. You'll need to convert the SAE engine oil weight to the ISO compressor oil weight in order to select the right one. Or, of course, Amsoil could simply help you with that.

Top
#2025234 - 09/23/10 08:35 AM Re: Air Compressor Oil [Re: artbuc]
ARCOgraphite Offline


Registered: 05/17/09
Posts: 8917
Loc: N.H, U.S.A.
No modern multiweights still break down, shear out of grade and leave damaging deposits. What have you been using for the ppast 2 decades, seeing its 25 years old? I would think a 5w-20 oil should be safe with MUCH less VII than a 5w-30. If not use a quality SAE20 HD - if you can find one.


Edited by ARCOgraphite (09/23/10 08:37 AM)
_________________________
2014 Nissan Rogue S CVT, OC#1 2129+mi- Supertech Syn 5W30 + PCX-004 Filter
2015 Forester 6MT 5Door, OC#2 9991mi-VSP 0W20 + Blue service "FRAM" Filter

Top
#2025235 - 09/23/10 08:37 AM Re: Air Compressor Oil [Re: artbuc]
440Magnum Offline


Registered: 02/01/09
Posts: 6726
Loc: Texas
Go with a compressor oil.
_________________________
'66 Dodge Polara & '69 Dodge Coronet R/T both 440/727
'08 Ram 1500 4.7/545RFE
'12 Challenger SRT8 392/6-speed
'99 Cherokee 4.0, '11 Grand Cherokee 3.6

Top
#2027407 - 09/25/10 01:27 PM Re: Air Compressor Oil [Re: artbuc]
01rangerxl Offline


Registered: 04/08/06
Posts: 7984
Loc: Birmingham, AL
For most compressors you have three choices:
30 non-detergent
5W30 or 10W30 full synthetic
compressor oil

Campbell Hausfeld/Rigid recommends those oils for most of their oil lubricated pumps.
_________________________
2002 Ford Ranger XLT
3.0 V6 / 5-Speed Automatic / 2WD
165K miles

Top
#2027426 - 09/25/10 01:55 PM Re: Air Compressor Oil [Re: artbuc]
JTK Offline


Registered: 08/14/03
Posts: 7615
Loc: Buffalo, NY
Originally Posted By: artbuc
I have a 25 year old Sears oil lubricated air compressor with a 2HP electric motor. The Owners Manual says to use 20-20W SF oil in summer and 10W oil in winter...


Are you sure it's not older? That is a really odd spec for something that's only 25yrs old. I've seen the 20w20 spec on various equipment, but it was well over 30yrs old. I'd throw a 5w20 motor oil in there, especially if you need to start it cold.

Joel
_________________________
2014 Subaru XV Crosstek 2.0L, 5spd, 2013 Dodge Grand Caravan SE (Babe magnet III)

Top
#2028043 - 09/26/10 06:57 AM Re: Air Compressor Oil [Re: artbuc]
Craig in Canada Offline


Registered: 04/06/06
Posts: 1995
Loc: Toronto-ish, Canada
Here's the thread from 2007 where I was figuring this out.

I found that Amsoil's ISO/SAE cross reference was about one grade off from everyone else's. It was determined that this was because of the properties of the syn (likely PAO) basestock they were using having a VI much better than the typical dino base for which most conversion charts are written.

http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=882243

If you don't want to contact someone like Amsoil and simply ask about "SAE 20W20" compressor oil you could search for a table somewhere for the median viscosity @40C of 20W20 dino and then use a table like this to map to the ISO rating.



Edited by Craig in Canada (09/26/10 06:58 AM)

Top
#2028077 - 09/26/10 08:00 AM Re: Air Compressor Oil [Re: artbuc]
Pablo Offline


Registered: 10/28/02
Posts: 46809
Loc: Duvall WA - Pacific NW USA
They are basically telling you not use engine oil.

This is what you want: Amsoil ISO 46 oil (~SAE 20)

The thing people forget is that compressor oil is rated (with an ISO rating, not SAE) at 40C, not 100C as SAE motor oil is.

Top
#2029017 - 09/27/10 08:54 AM Re: Air Compressor Oil [Re: JTK]
artbuc Offline


Registered: 12/02/05
Posts: 532
Loc: West Chester, PA
Originally Posted By: JTK
Originally Posted By: artbuc
I have a 25 year old Sears oil lubricated air compressor with a 2HP electric motor. The Owners Manual says to use 20-20W SF oil in summer and 10W oil in winter...


Are you sure it's not older? That is a really odd spec for something that's only 25yrs old. I've seen the 20w20 spec on various equipment, but it was well over 30yrs old. I'd throw a 5w20 motor oil in there, especially if you need to start it cold.

Joel


Joel, I can't remember exactly when I bought this unit but I am pretty sure it is in the 20-25 year range. For kicks & giggles, I will confirm the manufacturing date.

I did look at the oil over the W/E. It looks great. Can't remember when I changed it last but it has been years. I don't use it very much so I may still be well under the 100 hour OCI.

Top
#2030992 - 09/28/10 09:34 PM Re: Air Compressor Oil [Re: artbuc]
Eastexan Offline


Registered: 10/08/03
Posts: 73
Loc: East Texas
Originally Posted By: artbuc
Originally Posted By: JTK
Originally Posted By: artbuc
I have a 25 year old Sears oil lubricated air compressor with a 2HP electric motor. The Owners Manual says to use 20-20W SF oil in summer and 10W oil in winter...


Are you sure it's not older? That is a really odd spec for something that's only 25yrs old. I've seen the 20w20 spec on various equipment, but it was well over 30yrs old. I'd throw a 5w20 motor oil in there, especially if you need to start it cold.

Joel


Joel, I can't remember exactly when I bought this unit but I am pretty sure it is in the 20-25 year range. For kicks & giggles, I will confirm the manufacturing date.

I did look at the oil over the W/E. It looks great. Can't remember when I changed it last but it has been years. I don't use it very much so I may still be well under the 100 hour OCI.


My Craftsman is 22 years old (1988) and has the same oil spec as yours. I bought it about 2 years ago from a guy who had bought it used but had never ran it since he didn't have 220v hookup.

So I don't know what oil had been used in it all those years. But it was dirty and needed changed, so I called a Devilbiss (manufacturer) tech and he said it was spec'd to use the 20-20w SF, but that I could use a good syn motor oil in it. I had some 10w30 PP on hand and used that, and it's been doing fine ever since.

Top
#2032484 - 09/30/10 08:45 AM Re: Air Compressor Oil [Re: Eastexan]
artbuc Offline


Registered: 12/02/05
Posts: 532
Loc: West Chester, PA
Eastexan, my Craftsman can run on 120 or 240. The wiring conversion is simple with directions right on the motor. Takes about a minute to do it.

Top