Enterprise Holdings Inc., the world’s largest car rental company, is partnering with the world’s largest oil re‑refiner, Safety-Kleen, to close the loop on oil consumption at its North American airport operations.

Enterprise Holdings operates the Enterprise Rent‑A‑Car, National Car Rental and Alamo Rent A Car brands – as well as more than 1.2 million vehicles – through its network of regional subsidiaries and franchises in the U.S. and Canada.

Clean Harbors Inc.’s Safety-Kleen subsidiary is a leading North American used oil recycling and re-refining, parts washers and environmental solutions company for small quantity waste generators supported by the largest re-refining capabilities to convert used oil into base and blended lube oils.

Since 2009, the Enterprise, National and Alamo airport locations in North America have recycled more than 5 million gallons of used motor oil. These airport car‑rental service centers work with partner Safety‑Kleen to collect used oil from vehicle engines. The oil is then re‑refined by Kleen Performance Products, a new business unit formed by Clean Harbors last October, dedicated to the research, development, sales and distribution of high-quality engine oils, lubricants and other automotive and industrial products. The re-refined base oil is blended with additives and marketed under the company’s Eco Power brand and then reused in the Enterprise Holdings fleet.

“Using Kleen Performance Products in our fleet offers significant environmental benefits while delivering a high‑quality product that is equal to or better than oil from original crude, and at a comparable price,” said Dan Wessel, vice president of business management who oversees supply chain management for Enterprise Holdings. “It’s the responsible business choice for our fleet, for our customers and for our bottom line.”

By continuously re‑recycling oil, Enterprise Holdings has avoided more than 54,000 metric tons of greenhouse gas emissions during the last seven years.

“Oil re‑recycling and re‑refining remains one of sustainability’s greatest stories,” said Mark Bouldin, president of Kleen Performance Products. “Enterprise Holdings is at the forefront of embracing and championing this very effective way to manage oil as a renewable resource and is clearly out in front within the rental fleet industry.”

Enterprise Holdings’ service centers also work with Safety‑Kleen to recycle 100% of the material in used oil filters – diverting thousands of pounds of used oil, plastic, metal and paper from landfills.