... , cleaned, and used again. Recycling used motor oil conserves a natural resource (oil) and is good for the environment too ... or into storm drains, or tossed into trash cans (even in a sealed container) can contaminate and pollute the soil, groundwater, streams, and ... effectively remove colloid, oxid, acid, pitch, particles, impurities, water, gas in the used oil. Specially, it can restore the color of ...