Your air compressor may be one of the bigger investments you've made in your shop. For a long service life, it must be maintained and serviced. This includes keeping the air compressor oil at the proper level and changing it when needed. The most common signs that you need to check the oil levels in your air compressor include an overheating motor, air leaks, and low output pressure. Air compressor oil and motor oil are not interchangeable, and only air compressor oil should be used in your compressor. O'Reilly Auto Parts carries air compressor oil for your hard-working machine. Whether you're searching for single quarts of oil or full service kits, O'Reilly Auto Parts has options to help you maintain your air compressor.