The word from Maine Eastern is that the F-40s use excessive fuel,but I suspect that the parent M&E probably has some lessor in mind for the F-40s. The F-40s will probably be more reliable than the older FL-9s,for commuter rail versus excursion service. The FL-9s have(or had)the older 567 engine vs. the 645 model for the F-40. These numbers are the cubic inches per cylinder,so with all those cylinders it should add up,but there are other factors.
Hey, got an idea! Whay doesn't the State of Maine waste,oops,I mean spend our taxpayer dollars,putting a 3rd rail beside the Rockland Branch so the FL-9s can opearte on electric power,to really save fuel as they did in New York City. The influx of materials will provide traffic for the Maine Eastern freight service,and God knows they need it! Bud