NSH GER (Used oil purifier, oil regeneration, oil reconditioning, oil purification, oil reprocessing, oil treatment, oil recovery, oil disposal, oil filtration, oil filtering, oil reclamation, oil filters) series engine oil regeneration System is particularly suitable to regenerate internal-combustion engine oil including diesel engine oil, gasoline engine oil and internal-combustion engine oils. GER series can effectively remove colloid, oxide, acid, pitch, particles, impurities, water, gas in the oil.