To get Oregon plates and Oregon title and renew your registration outside the Portland Metro and Medford/Ashland areas, you can go to Oregon DMV Title, Renewal to take care of this and pay. If your vehicle is over four years old and you live in the Portland Metro area or Medford/Ashland area, you have to have an emissions test every two years in order to renew your registration. Here's a link to type in your address and see if you need to be tested Testing Boundaries Look Up. If you need to be tested you can take your car to the nearest DEQ test station or there are local businesses such as Jiffy Lube and others that offer DEQ Too and they will test your vehicle while you wait.