Xentx Lubricants, a subsidiary of US-based Green Planet Group, has started first fleet-wide installation of its Xentx Diesel Fuel Additive, a a combustion enhancer.

This Xentx Diesel Fuel Additive improves diesel fuel combustion, resulting in improved fuel economy while reducing harmful emissions.

The company began testing Xentx Diesel Fuel Additive in May 2010 on the diesel fuel-only buses.

The second phase of the test, in which the Xentx fuel additive has been mixed with bio-diesel fuel, is ongoing.

The company said the bus engines have improved in efficiency and emissions have been reduced, and the overall annual savings of this program will exceed $2m.

Green Planet Group engages in ongoing research and development to create eco-friendly products and services for the new, green economy.