(Portland, OR)  --  Lower crude oil prices and weak demand continue to send gas prices down.  Triple-A reports that over the last week the national average declined a nickel to three-25 a gallon.  Oregon's average dropped seven cents to four-04.  Triple-A projects Oregon's average will move below four dollars a gallon.  Seventeen Oregon counties currently have averages below four dollars.  There are reports OPEC Plus could cut production levels which could slow or end declines in fuel prices.