Can Automotive Engine Oil Be Used in Air Compressors?
2 Answers
It depends on the type of air compressor. Piston-type air compressors can use automotive engine oil, while other types of air compressors should use dedicated compressor oil and must not use automotive engine oil. Below is relevant information about compressor oil: Functions of Compressor Oil: Compressor oil is a liquid lubricant used in various types of machinery to reduce friction and protect mechanical components and workpieces. It primarily serves functions such as lubrication, cooling, rust prevention, cleaning, sealing, and cushioning. Classification of Compressor Oil: Compressor oil can be divided into two main categories based on the type of base oil: mineral-based compressor oil and synthetic compressor oil. Common Models of Compressor Oil: L-DAA, L-DAB, L-DAG, L-DAH, etc.
It's best not to mix air compressor oil with automotive engine oil, speaking from a compressor maintenance perspective. Compressors require special oil to withstand high temperatures and air compression conditions, preventing oil evaporation and carbon deposits. Automotive engine oil, designed for engines, may contain additives that could degrade compressor performance, such as causing excessive oil temperatures or reduced lubrication. I've seen cases where automotive oil was used temporarily in emergencies, and it might work temporarily, but long-term use can increase wear and even shorten the air compressor's lifespan. It's advisable to check the compressor manual for the recommended specialized oil, ensuring the viscosity grade matches—typically SAE 30 or 40 specific oils are appropriate. Don't save small money only to face major repairs later.
