Here is one of only two definitive, peer reviewed papers ever done on the REAL, ACTUAL data comparing steam operations to diesel electrics. Here is the exhaustive proof for anyone who is interested in the subject. All rail fan crap put aside.
This paper was commissioned after dieselization had taken place. The author was one of the most highly respected design engineers of the time. He was employed by Gibbs and Hill consulting firm. They designed the first subway cars, electrified the Pennsylvania and were involved in the massive Penn Station tunneling project.
It's a lot to get through, but; if you are of an engineering bent, this is the kind of stuff you are looking for.
The rapid conversion of steam to diesel was a huge miscalculation which cost the Railroads dearly.
Hope you enjoy it. Read away.
You will find it at the bottom of the page below. The direct link to the paper wouldn't work for some reason. It's the paper by H.F. Brown. The Economic Results of Diesel Electric Motive Power on the Railroads of the United States. Pub 1961.http://5at.co.uk/index.php/references-and-links/reference-material---steam-vs-diesel.html
I know I put this up before, but; now here is a place you can actually read the paper. I hope that somebody will take the time to read this. It closes the book on the entire 50 year argument.