... just gets dirty and can be recycled, cleaned, and used again. Recycling used motor oil conserves a natural resource (oil) and is ... oil including diesel engine oil, gasoline engine oil and used hydraulic oil, other used machinery’s lubrication oil. ZSY series are able ... effectively remove colloid, oxid, acid, pitch, particles, impurities, water, gas in the used oil. Specially, it can restore the color of ...