I suggest installing whiteline poly bushings. they are expensive but will last a long time. I just had to replace my front lower control arm bushings as they lasted only...gasp 15K miles before they started eating the tires. I finally changed them out at 20K, and a couple of tires look bad.....so probably need new tires as well.

Whiteline Suspension Parts - Part Number W52401 - Front Lower Control Arm Bushings - Inner Rear Position
Whiteline Suspension Parts - Part Number W52400 - Front Lower Control Arm Bushings - Inner Front Position