Just something to consider on this topic.... an old machinist friend of mine told me to always do the following to the new bushing before installing it, to ensure it is well oiled...

Plug the bottom with your thumb or palm, fill the bushing with oil, and apply pressure with your other thumb or palm until the oil weeps through the sides....

Not sure if this is standard practice or not but I've always done it and never had a bushing go bad on me yet.