Air compressors need specific oil for their size and type just the same as a car engine would. Similarly, oil is used to lubricate the moving parts of the machine and keep things running smoothly. The lubrication helps the compressor from wearing out quickly, reducing heat, and even cleaning.
Oil Types
1. Synthetic Compressor Lubricant
This is a higher quality oil that uses a synthetic base. This type of oil tends to be more costly however, it pays off in service life. Synthetic lubricant typically results in 50% longer run time, it can extend the life of the compressor and reduce cost of oil related services. As mentioned before, oil is used to bring down the temperature of a compressor, synthetic lubricant keeps the machine at a lower temperature than standard oil would. Overall, this is a much cleaner, high-end oil with many benefits.
2. Standard/Mineral Compressor Oil
Standard oil uses a mineral base and is less expensive than synthetic oil. Standard oil is used more quickly because it heats up faster resulting in evaporation. This oil can cause more build up and “carry over” which means the oil is transferred to downstream components. As a result, it needs to be cleaned and changed more often. Overall, standard oil is not recommended for machines that run continuously. They are however recommended for smaller residential compressors.
Watch out!
There are several different types of compressors. For example, piston compressors, rotary screw, and rotary vane. Each compressor varies in its own specific needs, this applies to oils as well. Be wary of universal oil as it might harm the type of compressor you’re working with.
Determining a compressors oil life
Determining how long oil will last depends on the heat generated during compression. If you find your compressor needing frequent oil changes this could be because of the excess heat generation. Be sure to ask an expert about the industry average oil life expectancy and be cautious of compressors that are far from the average.