To ensure optimal performance—and maximum longevity—of your air compressor, you must perform periodic maintenance. Of the various tasks you should do, one of the most important is changing the oil. Here’s what you should know about air compressor lubricants so your equipment never fails. 

Why Is Changing the Oil Essential?

Over time, oil loses its viscosity, which essentially means it thickens and can no longer coat the various engine components evenly. This inhibits its lubricating capabilities until it becomes no longer prevents friction between the moving parts. If the oil in your air compressor needs changing, the machine may still work for a considerable amount of time. Eventually, though, it will jam, which could end up damaging many of its parts in the process. 

How Often Should the Oil Be Changed?

To determine how often you should change your air compressor’s oil, you must consider a variety of factors. Examples include the type of machine, the frequency with which you use it, and whether it has an oil filter. The owner’s manual should state the type of oil the equipment takes and its typical lifetime. Generally speaking, the oil in a rotary screw compressor should be changed after 7,000 hours of use. In reciprocating air compressors, on the other hand, the oil should be changed every 90 days. Finally, the oil in every air compressor should be changed at least once a year, even if the machine is rarely used. 

The owner’s manual should explain how to change the oil, but you can also find videos online detailing the process for the particular model you own. In general, you should turn off the machine before changing the oil, but you do not have to decompress the tank. You should then locate the oil tank, which may be in the crankcase or sump. There should be an accessible drain underneath the tank for emptying the old oil. You can then pour new oil in the opening on the top. 

When it comes time to change your air compressor’s oil, turn to Industrial Compressor Supplies. Based in Maryland Heights, MO, they ship quality air compressor parts, accessories, and lubricants nationwide. They’re also available 24/7 to clients in the St. Louis, MO, area for service, repairs, and maintenance. To order lubricant for your equipment, visit their website or call (877) 426-3131.