(Portland, OR) -- Gas is a little cheaper at the pump. Triple-A reports Oregon's average declined four cents over the last week to four-46 a gallon. The national average declined two cents to three-64. Lower crude oil prices and weaker demand helped cause prices to decline. Unrest in the Middle East and the Russia/Ukraine war will continue to cause crude oil prices to fluctuate and that will impact gas prices. The summer driving season is about the begin and that'll increase demand keeping gas prices higher.