The SNCF 141 R is a class of 2-8-2 steam locomotives of the Société Nationale des Chemins de fer Français (French State Railways).

Modifications included the overall height, the fitting of European couplers and buffers, left-hand drive, smoke deflectors (to a unique and instantly recognisable style) and a Kylchap exhaust on the second batch.

The massive introduction of oil fired locomotives was due to the fact that in the immediate post-war period, the quality coal was in high demand and SNCF was consuming 9 million tons per annum.

The enginemen nicknamed the locomotives mazoutières or charbonnières ("coal-scuttles") according to fuel employed; oil-burners were also called les goudronneuses ("tar spraying machines") by their crews.

Large scale production started in September, and reached its height during October, November, December and January, to slow down in February and March, and to continue until finished in May, or, an average of almost three engines per day!

The bar frames and the axle box bearings of 141 R 1–1100, appeared irreproachable, which made them powerful machines but economical to maintain.

Driving and firing controls were within reach while seated, with automatic coal feeding thanks to the mechanical stoker, and oil-firing was even easier.