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

Wow that Wikipedia page reads like an ad.