@zmoilrefinery.com: The engineer did an experiment to recycle the waste motor oil in our lab. Used motor oil firstly distillation and filtration, then get good oil, we will take the finished oil samples to the testing company for checking the sulfur value and density. Any interested to our distillation machines, please kindly contact with me. #oil#distillation#wasteoil#wasteoilrecycling#distillationmachine#diesel