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Thread: What oil for air compressor?
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12th Aug 2018, 04:05 PM #16Most Valued Member
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12th Aug 2018, 04:49 PM #17Most Valued Member
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Yes I just read your article, it is only an opinion, no links to any proof that ATF is suitable for compressors.
Obviously it works in your comp but that doesn't mean that it should be used in all comps, you might have a needle roller big end and the OP's comp's big end running in the alloy rod.
cheers, shed
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12th Aug 2018, 05:28 PM #18Most Valued Member
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Obviously from all the videos and articles on the web about this subject, it is clear that different oil grades may be specified for different pumps.
BIAB export compressors globally, Binks Bullows (who built my semi industrial grade compressor) also know a thing or two about the subject, I suspect more than anyone reading this post.
So use the oil grade recommended, if you can find it.
I would point out though that running too heavy an oil in a splash lubrication system (most compressors) can do more harm than good due to oil starvation. It's like penetrating oil, too thick is no good.
Most modern cars now run extremely low viscosity oils, and I don't see any blowing up as a result. I also have never seen a compressor with a roller bearing bottom end - those are usually the domain of high reving systems. But they may be out there.
The article is well worth a read and it is obviously relevant to the subject.
As for my air compressor, well it runs pretty cool, doesn't knock or rattle, and is only half a century old So do what you think best.
Cheers RobThe worst that can happen is you will fail.
But at least you tried.
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12th Aug 2018, 06:46 PM #19Diamond Member
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Well i have nearly 5 litres of Penrite Small Engine SAE30 so I may as well use it, majority here seem to think I will have no issues with it. It is just a chinese compressor after all.
Reading through the information sheet indicated that it's viscosity at 40 degrees Celsius is 90
https://www.penriteoil.com.au/produc...sae-30-mineral
https://www.penriteoil.com.au/assets...0(Mineral).pdf
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12th Aug 2018, 08:17 PM #20Most Valued Member
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Here s a short clip of a ride on mower that came into the workshop where i used to work sounding like the crusher at a quarry.
Yeah the owner reckoned the oil he put in it was bought from our shop.... yeah yeah pull the other one m8
so I don't know what it was in there that caused that..
https://www.youtube.com/watch?v=zsSte3qu7JE
Believe it or not I pulled out the crank and it all looked good, I just cleaned/washed/blew it all out and put a new set of valve lifters it
and it ran and sounded sweet as a bun.
cheers, shed
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12th Aug 2018, 08:32 PM #21Senior Member
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I'd be a bit terrified of a compressor approaching half a century, unless there was a fairly frequent hydrostatic test regime. A couple of the Pilots here run different weights, despite the common manufacturer. Little Chinese one runs something different again to confuse matters too!
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12th Aug 2018, 10:08 PM #22Most Valued Member
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My Clisby compressor calls for SAE 30 oil.
Chris
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13th Aug 2018, 05:51 AM #23Member: Blue and white apron brigade
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The cheap chinese compressor I bought some 15 years ago didn't have any oil changed or added to it for about 10 years. Every time I looked at the oil level glass it seemed to have the same level in it. Then one day I used it outside the shed and in the stronger lighting I realised what I was looking at was not the oil level but a stain on the glass left behind by the oil so I then decided to change the oil, What came out was about a cup of black ooze with a semi tarry consistency. I was amazed that it was still running. Anyway an oil change, new reed valves made from a beer can, fitted an auto drain valve, retightened all the fittings, and 5 year on my son has it and it is still running.
On my Clisby I use Pilot Air ISO 100 compressor oil - I bought it direct from Clisby as it was considerably cheaper than from Hare and Forbes.
FWIW ISO 100 is the same as SAE 30 for crankcase oils
More comparisons are available here https://www.engineeringtoolbox.com/i...de-d_1206.html
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13th Aug 2018, 03:02 PM #24Most Valued Member
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13th Aug 2018, 06:58 PM #25Banned
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I changed the oil in my compressor about 12 months after I got it, using Bunnings compressor oil. It was still a novelty then, haven't bothered since except for tops ups every five years or so. I bought the compressor in 1995. so the Bunnings oil is all my Ingersol Rand compressor has known for 22 years! I just might check the oil level tomorrow if I remember, or not, I wouldn't mind a bigger one!
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14th Aug 2018, 09:20 PM #26Senior Member
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Bunnings compressor oil.
Feeler gauge for broken reed valve - works well.
Both fine.
Cheers
Roger
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