In a message dated 9/19/2003 11:08:30 AM Central Daylight Time,
Well, maybe not in the US, excluding the aviation industry, I believe largeof Mobil 1 synthetic 30 weight motor oil, to the axle ends prior toi do apply a film
scale use of synthetic oil was started by the Nazi's in the 1940's in reaction
to their war time needs, roughly around late 1942/early 1943 or so.
For model railroad use, aren't some of the Labelle lube products synthetic?
Personally, I'd prefer to have free rolling trucks that don't require lube,
there are some fine rolling trucks out there now. Certainly so, in HO, I can't
speak for other scales.