Patrickt,
We are all giving him advise based on our states position on this. His state may have a complete different work around. I think southern Calif. isn't as quick to jump on an Oregon license plate, but they have Nevada and Arizona which could be the same as Oregon up here. I have seen the CHP turn around and cross the freeway median to stop a car or vehicle with an Oregon plate here. Really no reason to stop them as they could just radio in the plate and find out if it is really an Oregon car or someone living in this area. I do see a lot less Oregon plates the past year or so. And as I said earlier, one guy had to fight and spend quite a bit of money to keep them from taking his Cobra because he used a friends address in Oregon to register it there. Here the year of the block no longer matters, you need the SB-100 number or it has to meet the emission requirements of the year of the build.
Ron
Ron