Standard compressor oil is made by using a mineral base and are cheaper than synthetic compressor oil. Mineral oil is more volatile and is more likely to evaporate than synthetic oil. As a result, it is used up faster. It also has a higher oil carry-over, so it can get into the compressed air network despite the downstream components such as the oil filter and oil separator. Mineral oils are also significantly more reactive than synthetic oils. The carbon chains are not 100% saturated with hydrogen, which means that the oil reacts faster with other substances and can form clumps. This shortens the service life of the oil and the service life of the filters and oil separators. This type of oil is typically recommended for use in compressors that aren’t used continuously, or for homeowners/DIY’ers whose applications are lighter in nature.