FedEx Express improved fuel efficiency by 2.9% in fiscal year 2017 and has moved closer to meeting its corporate goal of a 50% increase by 2025 over 2005 levels, the company reported in its annual sustainability report.

FedEx has now reached 37.9% of its goal with eight years remaining for its vehicle delivery fleet. The parcel delivery company is implementing initiatives for fuel-efficient driving, vehicle technology improvements, and alternative fuel usage. In fiscal 2017, FedEx Express saved $51 million and avoided 219,714 metric tons of carbon-dioxide emissions.

The company has implemented a diverse fuel strategy by using diesel, gasoline, propane autogas, and natural gas in its delivery fleet.

In fiscal year 2017, FedEx lowered diesel emissions to 2.58 million metric tons from 2.6 million metric tons in 2016. Gasoline emissions increased to 241,287 metric tons from 236,429 metric tons. Emissions from cleaner-burning fuels increased as the company continues its shift toward alternative fuels. Emissions from propane autogas vehicles increased to 50,535 metric tons from 48,619 metric tons. Emissions from vehicles fueled by compressed natural gas and liquefied natural gas increased to 7,625 metric tons from 1,000 metric tons.