Before you go for your oil change grab the front passenger wheel and try to shake it to check for looseness or movement. If that does not reveal anything and if you feel like it, maybe jack up that corner of the car and shake it again checking for any looseness. If in doubt about what "looseness" is, do the same thing on the driver side and compare. If you find looseness on the passenger side then check the steering linkage for an easy fix or possible cause of problem. If everything seems normal then maybe it is time to let the dealer check it out while they are doing the oil change.