| Here is a breakdown of what the numbers mean: 20W50 20W- this refers to the (W) weight of the oil at room (or about) temperature. 50 - refers to the oils perfomance at engine operating temperature. In this case it means it will have the film strenght of a 50(W) weight oil. 10W30 10 Weight oil that performs like a 30 weight at engine operating temperature. So It's the second number that tells you how strong the oil film might be. I maybe wrong on some minor points here so anyone can feel free to correct me.
|