ROYAL PURPLE SYNTHETIC COMP OIL 1 Quart

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.

one of the best compressor lubricant oils in the industry. fully synthetic oil will last longer than regular oil. keeps my hpa compressor running silky smooth.

Great stuff period

I have used Royal Purple motor oil, gear oil, and compressor oil for years I use it for my compressor that supplies air to my pcp airguns. The compressor oil separates the water from the oil fast and it’s lubricity is well known. This oil is hard to beat. I use it in my Yong Cheng High Pressure DIGITAL compressor to fill my pcp guns and supply tanks. DrDave. Utah, USA

The pump threads that would screw on the bottle are not even close so the pump does not tighten down; it flops all over the place and if you are clumsy like me you will get oil all over the place. Second thing aboiut the pump; the suction tube is 1.5IN too short to reach the bottom of the bottle so the last 1/4 quart cant be suctioned up into the pump. This totally defeats the purpose of the pump all together. Just buy the oil and forgo the pump option for the additional 5.99. Pump IS NOT worth it at all.