Chuck, I read "in our timeframe" as meaning in the timeframe of this list . . . .
Might we remark that this is the STEAM era freight car list?
Steam locomotives tend to shed oil and grease outside the rail so not
all that roadbed staining is due to solid bearings on the cars.
Some got flung off side rods.
--- In STMFC@yahoogroups.com <mailto:STMFC%40yahoogroups.com> , "Steve Lucas" <stevelucas3@...>
If you look at photos of mainline track in our timeframe, you'll see
that the rails are often oily black to the outside of the track, and
rusty on the inside. This was a result of oil sprayed off wheelsets.
And yes, this oil had leaked from plain bearing journal boxes.