Raised in Wyoming and Colorado - we'd pronounce almost like oyu do, but more muk-FEAR-sun.

My Rog, from New Hampshire, says it the same way.

Maybe the FUR is a reflection of a Scottish accent? In my mind, I can hear a friend or two who are Scots kind of rolling it and it sounding more like FUR than FEAR, actually a kind of blend of the two which sounds more like muk-FAIR-sun.:-)