I just don't see the greasable ones working. Why, because the bushings actually become loose, wear completely and as a result, the sway bar moves around like nuts. I mean, when mine go, you can reach under the car, and move the bar with your hand. Now, is regreasing them going to fix that? No. Because their actually falling off the car when I go to get them replaced.
And again.... why should I spend more money to fix something that is obviously a design flaw, and is still under warranty?
And I'm sorry, but I know of no other car that does this. They way our suspension is designed it seems to put all of the stress on the bushings.