TC rep says to grease the bushings on the upper control arm every time you get an oil change (guessing every 10Kish miles) but I haven't had any problems since I've installed them about 1.5 years ago (bushings have the same form/size, no squeaks, and still can see grease around the bushings.) Does anyone here have the same experience where they don't seem to have to grease the UCA's bushings?