Can oil last indefinitely?

We do not really know how long oil can be purified and reused.

In the sixty-year history of manufacturing oil purification equipment, Allen Filters, Inc. has yet to experience a situation where, with routine and thorough purification with our equipment the oil could not be re-used for a very long time.

We consider oil a renewable resource.

In order to achieve the most effective design of equipment for oil purification and re-use, Allen Filters, Inc. has consistently applied the best available technologies such as computational hydrodynamic modeling followed by pilot testing to constantly improve the performance of its equipment.