Be careful. Smog may be the least of your concerns. When I was moving back to Ca. in 1994, they tried to nail me for sales tax on my truck. They said that because I owned the truck for less than 3 months before I moved that I bought the truck with the intention of bringing it into the state. They tried to get me to pay an extra 780.00 on top of my regristration fees. That was the straw that broke the camels back. I decided to stay in Oregon.