Over 500 F40PH locomotives have been manufactured by EMD, with the Chicago Metra owning and operating the largest number of surviving engines - 118. Metra has continuously operated using F40PH engines since the late 1970s to this day, alongside the newer MPI built MP36PH. Beginning in 2016, Metra began painting any F40PHs that went through rebuilds or other major service in a new paint scheme that was designed to imitate the paint scheme worn by Metra’s MP36PH engines.