Soon I知 planning on doing an overhaul of my suspension and replace most of the control arms and knuckle bushing. I知 trying to decide whether I should go with spherical bushings, urethane/rubber. I知 not too concerned about NVH but I壇 like to reduce recurring maintenance. I知 leaning toward going spherical but want to know how long booted high quality spherical bushings can be expected to last? I壇 be okay with replacing them every 15-20k miles.

Also, would it be wise to have urethane on some parts and spherical on others (ex. Urethane spring bucket bushing w/ spherical camber arm bushings). I知 not sure but wouldn稚 the room for deflection in the urethane cause extra stress on the sphericals?