yeah oilite is a great bearing material, but it‘s not exactly „normal“ metal, but sintered bronze. In essence, you clump together bronze powder with a binder and then heat it up until the binder is gone and the powder has stuck together. What‘s left behind is kind of like a sponge, which enables impregnation with oil. Very special process and nothing to do with metal always having „pores“ or anything where oil can seep in