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 Post subject: Compressor Oil
PostPosted: May Thu 16, 2019 5:17 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 16749
Location: Albuquerque, NM 87123
I had to buy a new air compressor today; my Sears compressor started spitting ball bearings so it went to the curb.
The new McGraw 20 gallon uses 30w non detergent oil. So, is synthetic oil better? What should I get?


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 Post subject: Re: Compressor Oil
PostPosted: May Thu 16, 2019 8:36 am 
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Location: Tyler, Texas 75707-4212
Not too sure you could even find a non-detergent synthetic. It does need to be ND unless you have a pressurized, filtered lube system. Some of the larger, screw pumps do use a synth, but they operate on a completely different lube principle that a reciprocal pump.

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 Post subject: Re: Compressor Oil
PostPosted: May Thu 16, 2019 11:16 am 
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Location: Liberty, Missouri
What few reciprocal compressors I've seen, including two stage types, use a simple splash oil system of some sort. I've just used good quality automotive oil my compressors, and changed it on or about new years day every year for the last 3 decades or so. Like any other mechanism, keeping the oil clean is the key to long life.

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 Post subject: Re: Compressor Oil
PostPosted: May Thu 16, 2019 11:57 am 
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Likely best to use whatever oil the manufacturer says to use and change it at least as often as they say. Their engineers designed it with a known lube spec in mind

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 Post subject: Re: Compressor Oil
PostPosted: May Thu 16, 2019 12:17 pm 
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Location: Montvale NJ, 07645
I have run Husky (Home Depot) compressor specific oil in my 80 gallon, 2 stage unit for 15 years and it has performed well so far. Just make sure you change it at recommended intervals. I don't think that full synthetic vs blended oils will make any difference unless you are a heavy commercial user, like an automotive repair shop. Most important is to make sure it is non-detergent so that it does not foam up.

Your weak point is not going to be the oil, but rather the quality of the parts that make up the unit.


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 Post subject: Re: Compressor Oil
PostPosted: May Thu 16, 2019 2:47 pm 
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Joined: Sep Tue 30, 2014 6:08 am
Posts: 5948
Location: Norfolk, VA
Home Depot sells the Husky Synthetic Blend Non-Detergent Compressor Oil.

https://www.homedepot.com/p/Husky-Synth ... /205183905

You get a few thousand hours more run with that than standard oil:

https://mastertoolrepair.com/air-compre ... 4_445.html

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