The CMM-G is designed to handle both mineral and synthetic gearbox lubricants, with recommended kinematic viscosity at 40 °C of 8-50 mm²/sec, density between 800-950 kg/m³, and an oil cleanliness around ISO 4406 class -/19/16 or better. It’s critical to flush the system and replace filter elements when switching between oil types to prevent mixing incompatible fluids.