Can't seem to find Poly Graphite bushings for a 6th gen Accord (Energy doesn't carry them). Prothane has some Super Grease thing and says they cut grooves in their bushings for the grease to sit in so it does not need to be lubricated again. I'm wondering how beneficial are Polyurethane bushings anyway. I dread squeaking so if it's not a big difference I'll stick with buying new stock bushings (need new ones anyway).