Yes, it has been proven that it is a perfect way to relieve stress Used motor oil which has impurities and dirt is fed right into a centrifuge. The centrifuge carries a rotor that spins an incredibly high RPM (revolutions each minute) and it pushes the impurities to the wall in the container that houses the rotor. This works because the mass from the impurities is more than the mass with the oil particles. Appropriate extraction methods are used to ensure that impurities along with the clean motor oil are properly separated, and the oil is able to be re-used. These filtering systems can also be suitable for use with small-scale biofuel setups to get rid of any impurities. Now if you are in good health generally and have the basics in place, here are some common causes of low libido and some great natural cures. s sex life, especially for long term lovers is the dominant presence of anxiety, distress, pressure coupled with over familiarity and too many obligation.