Filing taxes for Oregon state as Married but filing seperately. Filing Federal taxes as Married. Confused if I can do this.

Is this something that I can do legally? The reason I wan to file this way is because both my wife and I live in the state of Washington. My wife works in Washington while I work in Oregon. To me it makes sense to file married for the federal return. I am unsure though how I should file for my Oregon taxes. Again to me it makes sense to file Married but filing seperately for the Oregon return because my wife does not need to file for the state of Oregon. If it makes any difference, if I do Married but filing seperately I get a bigger return from the state of Oregon using taxact.com calcualtions.