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Compressor Oil

 
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Old 06-04-2015, 12:19 AM   #1
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Compressor Oil


Anyone ever change it? I have to say my last compressor was an imglo I had for 9 years and never Changed it. sold it still working fine. I have a Rolair that's about 3 or 4 years old and still on the same oil. Anyone ever have a compressor go kaput because they didn't Change it?
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Old 06-04-2015, 12:25 AM   #2
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Re: Compressor Oil


I think they go a long long time because there's no combustion, and they really don't get that many hours.

My high school job was at a diesel shop, and we had to change ours. Sometimes the shop compressor would run 4 hours a day while I mind-numbingly glassblasted the housings of 12 sets of injectors I was rebuilding.

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Old 06-04-2015, 04:58 AM   #3
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Re: Compressor Oil


I changed the oil in my dewalt twin tank, not because I thought it needed it, but because the damn thing didn't run for chit in cold weather. Drained out the 40w factory stuff and put in some Castrol 5w30 synthetic and she starts up much easier in cold temps now.
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Once blood weasels in my nose exploded just from cold. One guy in my crew when I was employee lost a couple of his foot fingers from cold.
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Old 06-04-2015, 06:33 AM   #4
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Re: Compressor Oil


Yes I do.
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Old 06-04-2015, 06:50 AM   #5
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Re: Compressor Oil


I changed my Rolair oil once in 12 yrs because it was recommended. I changed the engine, and welded pin holes in the tank before it the compressor finally went.

They way things are built now the thing will break down before the pump will.
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Old 06-04-2015, 06:58 AM   #6
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Re: Compressor Oil


Quote:
Originally Posted by Johnny_5 View Post
I changed the oil in my dewalt twin tank, not because I thought it needed it, but because the damn thing didn't run for chit in cold weather. Drained out the 40w factory stuff and put in some Castrol 5w30 synthetic and she starts up much easier in cold temps now.
You shouldn't use automotive oil in a compressor pump. For cold start issues get synthetic compressor oil.
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Old 06-04-2015, 06:31 PM   #7
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Re: Compressor Oil


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Originally Posted by tccoggs View Post
You shouldn't use automotive oil in a compressor pump. For cold start issues get synthetic compressor oil.
Never heard that, what is the reason?
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Once blood weasels in my nose exploded just from cold. One guy in my crew when I was employee lost a couple of his foot fingers from cold.
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Old 06-04-2015, 07:46 PM   #8
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Re: Compressor Oil


funny, my speedaire said "compressor oil or a high quality synthetic multi grade oil like mobil 1". I may be paraphrasing, the compressor is 15 years old.
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Old 06-04-2015, 09:27 PM   #9
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Re: Compressor Oil


Yes, once in 7 years
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Old 06-05-2015, 07:24 AM   #10
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Re: Compressor Oil


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Never heard that, what is the reason?
Automotive oils are designed for positive pressure oil systems and contain both anti foaming agents, detergents, as well as other things that are not meant for the bearings in a pump. Optimum film thickness is different, etc.

Same thing like why you don't run car oil in motorcycles as the friction inhibitors will screw up the wet clutch.

Honestly you will probably never have an issue using mobil 1 but synthetic compressor oil is the same price anyway so might as well follow the manufacturers instructions. My 5hp shop compressor specs non detergent SAE 30 which disqualifies most car oils.
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Old 06-05-2015, 07:03 PM   #11
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Re: Compressor Oil


We usually change the oil twice a year per compressor. But they do run 9-10 hours a day 6 days a week. Some days they run full tilt for most of the day.
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Old 06-05-2015, 10:41 PM   #12
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Re: Compressor Oil


Never.
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Old 06-06-2015, 06:03 AM   #13
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Re: Compressor Oil


We change our two compressors every couple months. They run non stop every day. It has to extend the life of them. Why wouldn't you change the oil.
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Old 06-06-2015, 01:13 PM   #14
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Re: Compressor Oil


Quote:
Originally Posted by tccoggs View Post
Automotive oils are designed for positive pressure oil systems and contain both anti foaming agents, detergents, as well as other things that are not meant for the bearings in a pump. Optimum film thickness is different, etc.

Same thing like why you don't run car oil in motorcycles as the friction inhibitors will screw up the wet clutch.

Honestly you will probably never have an issue using mobil 1 but synthetic compressor oil is the same price anyway so might as well follow the manufacturers instructions. My 5hp shop compressor specs non detergent SAE 30 which disqualifies most car oils.
SAE 30 is usually non detergent so are most straight full synthetic oils.

Last edited by Needles; 06-06-2015 at 01:27 PM.
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Old 06-06-2015, 01:28 PM   #15
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Re: Compressor Oil


Quote:
Originally Posted by muskoka guy View Post
We change our two compressors every couple months. They run non stop every day. It has to extend the life of them. Why wouldn't you change the oil.
My Emglo says every 3 months. But I only changed it once because there was water in the oil.
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Old 06-08-2015, 08:03 AM   #16
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Re: Compressor Oil


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My Emglo says every 3 months. But I only changed it once because there was water in the oil.
Water was the biggest issue here as well. Lost a pump on a shop compressor years back and looking at the case afterwards there was ice in it. The shop would get cold overnight and if there was water in the oil it would turn to mud. Clank clank clank, boom.

Owner wasnt happy that morning as it shut down all the machines that needed air as well including cnc, edgebander, sander, molder, upcut saw, etc.
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Old 06-08-2015, 08:24 AM   #17
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Re: Compressor Oil


Oh I change every year. But it is what the manual said I could use too.

Oh crap, I might be jumping on the "compressor oil" band wagon, as it seems that mobil 1 has changed formulations, and may or may not be suitable for compressor use!
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Old 06-08-2015, 01:59 PM   #18
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Re: Compressor Oil


Quote:
Originally Posted by Johnny_5 View Post
I changed the oil in my dewalt twin tank, not because I thought it needed it, but because the damn thing didn't run for chit in cold weather. Drained out the 40w factory stuff and put in some Castrol 5w30 synthetic and she starts up much easier in cold temps now.

I bought one and used it for half a day and worked great in 50 degree weather. Went to use it again on a 20 degree day and it just hummed for a minute and then fried the motor. Returned it and have just been using oiless compressors. I loved the compressor the first day. Since you've changed the oil, will it work in freezing temps?
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Old 06-09-2015, 05:03 AM   #19
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Re: Compressor Oil


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Originally Posted by mrcharles View Post
I bought one and used it for half a day and worked great in 50 degree weather. Went to use it again on a 20 degree day and it just hummed for a minute and then fried the motor. Returned it and have just been using oiless compressors. I loved the compressor the first day. Since you've changed the oil, will it work in freezing temps?
I've since gone oiless as well, but for bigger jobs still pull out the dewalt. It works much better in freezing temps, sometimes takes a few tries to get it running in the morning but as long as it cycles relatively frequently during the day it does pretty good. Occasionally the head pressure needs bled off if it sits for a bit. Shortest and heaviest extension cords possible.

Just don't use motor oil like I did, apparently it's frowned upon....
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Once blood weasels in my nose exploded just from cold. One guy in my crew when I was employee lost a couple of his foot fingers from cold.
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Old 06-09-2015, 05:58 AM   #20
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Re: Compressor Oil


Every few months but mine is ran 20+ hours a week.

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