[Railcarmover]

Superior shear,load and detergent factor. You can get a low ash spec if you want to run it in a modern car,later diesels use a DPF,subject to the same problems as modern cars using earlier versions of diesel grade engine oil.

Shear factor resists wiping effect of piston rings and cam lifter contact.

Load factor is the ability of the oil to handle pressure of rod and main bearings and cam bores.

High detergent factor means debris stay suspended in the oil instead of depositing on the parts,resulting in a cleaner engine and no sludge.