Recent Topics
Push Mowers won't start/run--advice?
by lukejo
08/30/14 09:12 PM
1/4" Drive Cordless Electric Ratchet
by john_pifer
08/30/14 09:10 PM
A switch to SOPUS
by volk06
08/30/14 09:00 PM
Recycling scrap engine parts
by oilboy123
08/30/14 08:46 PM
Shower Diverter Valve Stem Replacement
by Finz
08/30/14 08:30 PM
Acer netbook won't boot from USB
by ClutchDisc
08/30/14 07:42 PM
Dexter and Masuka
by Phishin
08/30/14 07:35 PM
Walmart rollback
by mjk
08/30/14 06:52 PM
New hobby project - DIY speakers
by MrHorspwer
08/30/14 05:24 PM
New brakes - 2008 Silverado
by Joe_Power
08/30/14 05:15 PM
leaving the key ON for an hour
by Nayov
08/30/14 05:14 PM
American Dagger Moth caterpillar
by Quattro Pete
08/30/14 05:09 PM
Newest Members
Helliar, jrmitch, ShovelDave, Mike141, jiffydarren
51144 Registered Users
Who's Online
95 registered (2009Edge, AdRock, andyd, aquariuscsm, 901Memphis, 12 invisible), 1515 Guests and 206 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
51144 Members
64 Forums
218548 Topics
3446127 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG

Page 1 of 2 1 2 >
Topic Options
#2474552 - 12/27/11 07:11 PM Question about air compressor oil?
johnsmellsalot Offline


Registered: 07/02/11
Posts: 526
Loc: Texas
What is the difference between SAE 30 non detergent motor oil and 30 weight air compressor oil? I'm just wondering because the motor oil is cheaper.
_________________________
1999 Buick Century 180,000 miles (first car)
2008 Chrysler PT Cruiser 70,000 miles

Top
#2474553 - 12/27/11 07:14 PM Re: Question about air compressor oil? [Re: johnsmellsalot]
xxch4osxx Offline


Registered: 03/11/09
Posts: 1542
Loc: Cedarbrae, Ontario
I think the base oils are different in compressor oil. Some are silicone based, others aren't.
_________________________
2004 Chev Silverado 4x4 using all Amsoil lubricants.
2008 Mazda 3 GS Sport Hatchback 5sp MT (Girlfriend's car)


Top
#2474578 - 12/27/11 07:33 PM Re: Question about air compressor oil? [Re: johnsmellsalot]
widman Offline


Registered: 05/27/02
Posts: 3045
Loc: Bolivia
The basic non-detergent is suggested because the detergent will absorb moisture and the compressor never gets hat enough to evaporate it. So a non-detergent lets the moisture settle out where you can drain it and it can't get into working parts.

What you need is an ISO 100 R&O compressor oil. Should be available in a lot of brands/stores. And should be cheaper than motor oil.
_________________________
Richard's Car Restorations

Top
#2474873 - 12/27/11 11:26 PM Re: Question about air compressor oil? [Re: johnsmellsalot]
mechtech2 Offline


Registered: 09/05/06
Posts: 19479
Loc: Chicago Area
I thought non detergent oil for lawnmowers and compressors was to make the oil 'stick' better to surfaces, and allow additives to work better.
As to heat, believe me, compressors get hot.

Top
#2474970 - 12/28/11 05:59 AM Re: Question about air compressor oil? [Re: johnsmellsalot]
Char Baby Offline


Registered: 05/25/05
Posts: 6962
Loc: Rochester NY
Originally Posted By: johnsmellsalot
What is the difference between SAE 30 non detergent motor oil and 30 weight air compressor oil? I'm just wondering because the motor oil is cheaper.


John,
The replies posted thus far may be sufficient and I wouldn't know the answer to this question myself but, to broaden your viewers(if you haven't already), you may also want to post this same question in the "Lawn Mower/Small Engine" Section
_________________________
"Finally Retired"!

1980 Firebird FORMULA V8
2001 Lexus RX-300 V6
2004 Nissan Altima 2.5S
2006 Mazda 3i 2.0L

Top
#2475988 - 12/29/11 04:22 AM Re: Question about air compressor oil? [Re: johnsmellsalot]
Char Baby Offline


Registered: 05/25/05
Posts: 6962
Loc: Rochester NY
Maybe not!
_________________________
"Finally Retired"!

1980 Firebird FORMULA V8
2001 Lexus RX-300 V6
2004 Nissan Altima 2.5S
2006 Mazda 3i 2.0L

Top
#2476015 - 12/29/11 06:39 AM Re: Question about air compressor oil? [Re: johnsmellsalot]
Mr_Joe Offline


Registered: 11/16/09
Posts: 347
Loc: Wisconsin
I bought a compressor & it came with some synthetic compressor oil. It was enough to fill it to the correct capacity. With the little bit required I'd just get the correct oil. I consider it something you fill and it's good to go for a fair amount of time.

Top
#2476116 - 12/29/11 08:50 AM Re: Question about air compressor oil? [Re: johnsmellsalot]
boraticus Offline


Registered: 04/19/09
Posts: 2533
Loc: Canada
Both of my compressors manuals specify Mobil 1 5W30.

Top
#2476161 - 12/29/11 09:37 AM Re: Question about air compressor oil? [Re: mechtech2]
exranger06 Offline


Registered: 01/25/08
Posts: 2549
Loc: Guilford, CT
Originally Posted By: mechtech2
I thought non detergent oil for lawnmowers and compressors was to make the oil 'stick' better to surfaces, and allow additives to work better.
As to heat, believe me, compressors get hot.


Additives? Non-detergent oil doesn't have any additives. And it's definitely not suitable for lawn mowers.
_________________________
2006 Ford Ranger Sport -54k mi
1992 Honda Accord EX -173k mi
1994 Ford Explorer Sport -190k mi
1994 Ford Bronco XLT (project)

Top
#2476181 - 12/29/11 09:54 AM Re: Question about air compressor oil? [Re: boraticus]
Clevy Offline


Registered: 11/11/10
Posts: 7097
Loc: Saskatoon canada
Originally Posted By: boraticus
Both of my compressors manuals specify Mobil 1 5W30.

What? I own 11 gas powered air compressors. All honda's with either v-twin or inline twin pumps. They spec 5w-30 oil for the engines and non-detergent 10 weight for winter and non-detergent 20 weight for summer. And they all call for oil changes every 100 hours.
A 5w-30 will foam up in a compressor pump. I have seen it happen. And foamed up oil really doesn't lubricate well,does it.
Op. A non detergent oil is what you want. I switched over to amsoil's compressor oil due to it's cold flow properties in winter and it lasts longer.
_________________________
2006 Charger RT
Miles x 2 per oil filter

Top
#2476205 - 12/29/11 10:09 AM Re: Question about air compressor oil? [Re: johnsmellsalot]
Clevy Offline


Registered: 11/11/10
Posts: 7097
Loc: Saskatoon canada
I don't know what the difference between the 2 oils are but if it's for an indoor use compressor either will work fine. If you are using it outside buy the thinnest oil you can find. Until the weather warms up anyway
_________________________
2006 Charger RT
Miles x 2 per oil filter

Top
#2476730 - 12/29/11 08:25 PM Re: Question about air compressor oil? [Re: Mr_Joe]
johnsmellsalot Offline


Registered: 07/02/11
Posts: 526
Loc: Texas
I agree. Since the oil capacity is only 5 ounces and the oil change intervals are twice a year, I'm just going to use the compressor oil. It costs a little more than regular non detergent oil. Maybe the compressor oil has something that regular oil doesn't.

My compressor is a 21 gallon Central Pneumatic from Harbor Freight. It didn't come with oil so I drove to Sears and bought some Craftsman 30 weight compressor oil before firing it up.
Originally Posted By: Mr_Joe
I bought a compressor & it came with some synthetic compressor oil. It was enough to fill it to the correct capacity. With the little bit required I'd just get the correct oil. I consider it something you fill and it's good to go for a fair amount of time.
_________________________
1999 Buick Century 180,000 miles (first car)
2008 Chrysler PT Cruiser 70,000 miles

Top
#2477122 - 12/30/11 08:52 AM Re: Question about air compressor oil? [Re: Clevy]
boraticus Offline


Registered: 04/19/09
Posts: 2533
Loc: Canada
Originally Posted By: Clevy
Originally Posted By: boraticus
Both of my compressors manuals specify Mobil 1 5W30.

What? I own 11 gas powered air compressors. All honda's with either v-twin or inline twin pumps. They spec 5w-30 oil for the engines and non-detergent 10 weight for winter and non-detergent 20 weight for summer. And they all call for oil changes every 100 hours.
A 5w-30 will foam up in a compressor pump. I have seen it happen. And foamed up oil really doesn't lubricate well,does it.
Op. A non detergent oil is what you want. I switched over to amsoil's compressor oil due to it's cold flow properties in winter and it lasts longer.


This is the excerpt from my air compressor operators manual:

"For this compressor, use 250 mL / 8.4 oz of ISO100 (SAE 30), non-detergent compressor oil, or Mobil 1 5W30 synthetic.
Do not use regular automotive oil such as 10W-30. Additives in regular motor oil can cause valve deposits and reduce pump life. For maximum pump life, drain and replace oil after the first hour of run time."

I chose Mobil 1 5W30 because my compressors are kept in unheated garages. Makes them easier to crank up in winter. With the original straight 30 oil, they were very hesitant to turn over at below zero temps. Now they spin up right away.

Top
#2477525 - 12/30/11 03:02 PM Re: Question about air compressor oil? [Re: boraticus]
JTK Offline


Registered: 08/14/03
Posts: 7228
Loc: Buffalo, NY
I've always used what ever oil I had in the garage the few times I've had to fiddle with small portable air compressors. Most likely 10w30, 5w30 or SAE30.

I personally would never stress over trying to locate a non-detergent oil.

If it was a super high dollar commercial compressor, I'd be more inclined to use what the manufacturer suggests.

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

Top
#2478397 - 12/31/11 01:48 PM Re: Question about air compressor oil? [Re: johnsmellsalot]
Ken2 Offline


Registered: 12/02/02
Posts: 6135
Loc: Washington St.
I've had valve deposit problems with 40 wt. diesel engine oil (high detergents) in some 20 hp compressors I was running. A change to an industrial oil (similar to a heavy hydraulic oil) worked great. It all depends on what the compressor maker wants. In some 50 hp, 450 psi compressors, 32 viscosity rust & oxidation inhibited (R & O) oil was the right stuff.

I agree about the detergent oil holding water in emulsion, but a non detergent oil that lets the water settle out needs to be drained--both do when water accumulates. The settled out water, if allowed to accumulate in excess, means that on start up the compressor will be lubed with water instead of oil.
_________________________
Every gun that is made, every warship launched..a theft from those who hunger and are not fed, those who are cold and not clothed.
Gen. Eisenhower


Top
Page 1 of 2 1 2 >