![Repowering existing freight locomotives to zero NOx, PM and CO2 emissions using RNG. (Graphic and caption details, courtesy of Business Wire and OptiFuel)](https://www.railwayage.com/wp-content/uploads/2022/07/Screen-Shot-2022-07-13-at-9.48.43-AM-315x168.png)
OptiFuel Lands Locomotive Repower Project in Argentina
Beaufort, S.C.-based OptiFuel Systems has signed a collaboration agreement with the Argentina Ministry of Transportation through Ferrocarriles Argentinos Sociedad del Estado (F.A.S.E.) to upgrade 400 switcher and line-haul freight locomotives from diesel to compressed natural gas (CNG) and/or renewable natural gas (RNG) power.