It's hard to say whether they will pass this or not.
The main people against "self-serve" claim that it would sky-rocket the unemployment rate in the state (OR already has one of the highest unemployment rates in the nation).
What these people don't realize is that it will actually have little impact on the unemployment since they will still have to have attendants for cash collection and security.

Most of the stations I've seen or been to in OR, have 1-2 attendants on duty now, they'll still need 1-2 on duty if the law passes.
Sad, is the fact that I pumped gas for 12 years, while growing up in my Dad's service station, but according to the state of OR, I'm unqualified to pump my own gas!
Harder