News & Reviews News Wire MBTA, Keolis testing renewable fuel for commuter-rail diesels

MBTA, Keolis testing renewable fuel for commuter-rail diesels

By Trains Staff | May 16, 2025

Pilot program involves Newburyport Line trains

Email Newsletter

Get the newest photos, videos, stories, and more from Trains.com brands. Sign-up for email today!

MBTA commuter train on bridge
Rockport-bound MBTA train No. 1101 paasses through Beverly, Mass., in August 2011. Some Newburyport/Rockport trains are now powered by locomotives using renewable diesel fuel. Scott A. Hartley

BOSTON — The Massachusetts Bay Transportation Authority and its contract operator, Keolis Commuter Services, have begun a pilot program using renewable diesel fuel for some locomotives on the MBTA commuter rail network.

The program, announced earlier this week, involves locomotives that layover at Newburyport, Mass., facility at the end of Newburyport branch on the MBTA’s Newburyport/Rockport Line. Those locomotives are now fueled with Hydrotreated Vegetable Oil, a sustainable alternative made with vegetable oil and animal fats that emits less carbon than conventional diesel fuel.

“We’re pleased to partner with Keolis on this renewable diesel pilot as we continuously seek ways to reduce our carbon footprint,” MBTA CEO Phillip Eng said in a press release. “Testing alternative fuel sources for our commuter rail fleet joins other efforts at the T to lower our carbon emissions, and we look forward to evaluating the results of the pilot as we continue to increase resiliency across the system.”

Keolis CEO Abdellah Chajai said the program “can reduce CO2 emissions by more than 70% for these locomotives compared to fossil diesel. We’re pleased to partner with the MBTA to make this pilot project a success.” So far, Keolis reports, locomotive performance has been steady with the new fuel.

So far, Keolis has seen steady locomotive performance with the use of renewable diesel. At the end of the pilot program, Keolis and MBTA will evaluate the performance of the renewable fuel and decide if it can be expanded to other locations across the Commuter Rail system. The length of the pilot program was not specified.

A number of passenger and freight operators have experimented with or are currently using biodiesel and renewable fuel, including Amtrak’s Pacific Surfliner; commuter operators Altamont Corridor Express and Metrolink; Canadian National; Union Pacific; and BNSF.

2 thoughts on “MBTA, Keolis testing renewable fuel for commuter-rail diesels

  1. We get filtered deep fry oil from restaurants, burns very well with little exhaust smoke in the Mercedes diesels, and smells like an American Legion Friday fish fry dinner.

  2. How does burning vegetable oil and animal fats emit less carbon than burning petroleum? I never took organic chemistry, but seems to me either way, it’s combining carbon and oxygen, to get heat plus carbon dioxide. Something like that.

You must login to submit a comment