Brad Smith wrote:RR's use a different type and grade of diesel than highway vehicles do.
Not True, #2 oil is home heating fuel, diesel fuel - offroad is dyed - & Taxed diesel fuel is un-dyed so the fuel tax police can tell if you have been cheating BUT it is all the same. The Cetane [like octane in a gas engine], Parafin Wax content & pour point change acording to the regional conditions. I've had a unit fuel in Panama City, FL [80 degrees] and it's fuel is semi-solid gel in Thunder Bay Ontario [-40 degrees] because the additive package was incorrect for the conditions.
Stationary Boilers and Ships use Bunker Oil [#4 Oil or # 6 Oil] which get tar-like when cold and is not useful in train/truck transportation units.
Diesel Fuel used to be around $0.10 less than gasoline; in the 60's it was $0.20 or so a gal. that's why it was so popular as a train fuel and road fuel. Big rigs get 5 - 8 MPG moving 80,000 LBS because they get MORE energy from diesel fuel. In the 50's Gasoline rigs got 2 - 3 MPG and barely climbed the hills. My dad said the drivers had a DAILY fistfight to see who drive the diesel that day back when my uncle had (4) trucks & one diesel [GMC 3cyl agound 120 HP.] cause the diesel climbed the hills better. By the mid 60's it was hard to find a class 4 & up truck that was still using gasoline...
Grandson of a LV Conductor & I remember the EL running behind the Univ. of Scranton [class of 76]