Be certain, when you buy, that you are getting a full warranty. Make sure to research and ask questions, when comparing warranty information. We have 3 different extended warranty options to choose from so you can pick what best suits your company’s needs. This ensures the correct oil and filters are being used, to keep your piston air compressor running for years to come. With our extended warranty, we don’t ask you to buy a service plan, we just ask that you purchase and use our oil and filters. Polar Air, by Eaton Compressor, backs all our piston air compressors with the best warranty in the industry.