Royal PurpleSynthetic COMP Oil 1 Quart (Pack of 2)

Using this in a Yong Heng , almost second guessed my purchase before receiving due to online speculation on oils (you know how that goes) I can report at least 2 hours of runtime so far and the oil has not turned black and the compressor sounds great. Very impressive when dealing with pressures north of 4000 psi filling tanks. I think this is a solid choice as others have stated. I will try to report back after first oil change what I find. The oil is dark however you can clearly see bright purple in the sight glass so a color change won’t be as hard as people make it sound when time for oil change or inspection. This oil was probably way easier than others due to the gear oil like spout and easy fill control when topping off. Extremely satisfied so far like most royal purple purchases so far. Seeing the temperatures encountered and climate conditions I think this is the answer for reliable high performance from this compressor.I couldn’t find a lot on Amazon about this oil in a yong heng so hopefully this helps answer specific questions I had.

Great for the compressor and I would buy again and recommend too.

This is the ONLY oil we put in our 4500 psi air compressor.

I bought this synthetic oil to use in my John Deere 3800 psi pressure washer and Central Pneumatic 21 gallon, 2.5 HP air compressor. I use my air compressor for occasional auto maintenance and trim work in my home and my pressure washer for routine house, deck, and car cleaning. Occasionally, my friends will stop by to use them but I am by no means a "professional" user. I have had both of these for about 10 years and change the pump oil every spring. I of course top off the oil as needed between changes. I have always used synthetic motor oil in the small engines but just conventional compressor oil. Normally, I just pick up a quart of some random compressor oil for about $8/quart and change it out with that. I was recently researching synthetic compressor oils and Royal Purple kept showing up as one of the top rated fully synthetic oils out there so I decided to give it a try. I ran my compressor and pressure washer for about 5-7 minutes and flushed the oil with the cheap stuff. I ran them again and checked the temperature with an IR thermometer then drained the oil and put in the Royal Purple. Although I don't have a decibel meter, both were noticeably quieter. After they both had cooled down for a few hours I ran them again and checked the temperature with the IR and they were about 10°F-15°F cooler. They normally run around 220°F but are now running about 205°F-210°F so that is a definite improvement. Although this stuff runs about $20/quart, it is definitely worth it because of the lower pump temps and quieter operation which I assume means that the lubrication is much better. I will definitely be buying Royal Purple again.

Good quality oil . I used this in my compressor. The machine runs now smoothly and the noise of pistons is less than before. Recommended .

This is the stuff that my commercial air compressor company recommended for changing my compressor oil (yes...you are supposed to change this oil regularly). It works wonderfully!Big Rudy

My two-stage compressor actually runs better after using this oil. this is an exceptional oil. I will definitely buy it again.

Best oil for the Yong Heng 4500 PSI compressor for filling PCP Rifles and Paintball tanks. update 12-16-2019 I have been using this oil for a while now with zero issues, color changes in oilman or smoke smell. I pound the crap out of this compressor running over a dozen gun, and feeding the over 4000 pellets a week between myself and several grandkids who love to shoot. This is worth every penny that it costs and if your using anything else in you Yong Heng, well, your either rich and can afford to buy more compressors or your just an idiot. There isn’t any better way to lubricate you HPA compressor. Period. This thing gets pounded...taken care of but used a hell of a lot. If this oil wasn’t any good I would just say it sucked....fortunately that is not the case. Buy it and save your investment for years to come. This compressor maybe made in China and is cheaper than most but it is not cheaply made and this oil will prove that.

Great products.

It’s really purple !!! My air compressor seems to enjoy it!! Air compressor are usually neglected in a corner of the garage. So the least thing we can do is to gave them a good quality oil.Is royal purple the best ever compressor oil probably not but I’m sure it’s not far from the top of the list!For me I buy it on Black Friday dealMoney/value/quality I can’t find better deal. I’m really happy with my purchase. It’s in my wish list as soon as I see a discount I’ll buy it again without hesitation

Great stuff period

Realy great oil for summer and warm wheater made my compresseur run smooth and less noisy ,But not so much for cold days . Had syntetic oil from other Brand and didnt cause probleme at -20c' with this one at 2 'c it pop my compressor fuse .Overall great stuff for summer or heated garage

Good oil brand, but is thick oil, in cold weather turn off power. Need to empty all air from compressor to start without problem.