MikeT49
Gold $$ Contributor
What is this Husky oil of which you speak? I use the Kobalt oil that is pictured. Why do I use that oil? Well, I sure as hell didn't rely on internet gurus. For background info: I'm a retired nuc engineering tech, my bud is a retired nuclear engineer. We had been looking for reasonably priced HP compressors for quite a while. Not interested in the "Shoe box" compressors that were available then. Way too much hassle and constant maintenance. About 3 years ago, I noticed the Yong Hengs on eBay. $240 at that time. At that price we were both willing to get one. Early in 2020 my bud got his compressor in. He then commenced to research what oil to use. He did not refer to any internet gurus. He actually did the research. What he came up with is the Kobalt. Did I mention my bud is a very competent engineer? Fast forward to today. I have run my compressor hard for over 2 years. I've got four tanks and I fill my neighbors tank. I've done at least 150 tank fills. The oil in my crankcase stays clear (ie no combustion products). It stays so clear, it's very hard to see in the viewing window. I ran it for a year and a half, before I noticed the oil start to discolor. Over that time the oil level only dropped about 1/16". When I run equipment, I pay attention. The manufacturer calls for a max temp of 75C. I run my unit to never exceed 60C. I recently cleaned the dinker filter that I use on the outlet of my tanks to fill guns. After thousands of gun fills it was remarkably clean. The first cotton wafer was discolored a yellowish brown. The next one was slightly discolored on the side abutting the first wafer. The rest were white and all were dry. I build airguns. I have taken guns apart that I have been filling using my methods. After I get the components out of the main tube, I roll a paper towel into a cylinder and push it thru the main tube and check for contamination from oil or rust from water. I have not seen anything yet that worries me.One more thing that I noticed in the picture was the bottle of husky compressor oil. These low pressure compressor oils are known to have a low flash point and can detonate in the second stage of the high pressure compressor. Detonation from oil vapors getting into second stage cylinder of these compressors is one of the reasons these compressors fail. There is a lot of information out there on using the proper high pressure compressor oils. (https://www.airgunnation.com/threads/compressor-oil-which-is-the-correct-one.1211334/).