With regular oil analysis to ensure oil quality and cleanliness, the drain intervals for all four air compressors were extended up to eight times the OEM-recommended interval of 8,000 hours. Total cost savings – on oil alone – was $71,000. Environmental impact was reduced as well, with 1,035 fewer litres (273 fewer gallons) of waste oil. Fewer oil changes also meant less downtime, maintenance and labor. The overall effect for the company was significant cost savings on oil, maintenance time and disposal.