(Portland, OR) -- Gas prices increased in Oregon over the last week, but declined nationally. Triple-A reports the national average declined three cents to three-55 a gallon while Oregon's average increased three cents to four dollars and 30 cents. In Bend, the price for a gallon of regular went up a penny to four-34 a gallon. Lower demand and crude oil prices in the 70s are helping to off-set news that Saudi Arabia and OPEC-plus plans to cut production in July, which could eventually cause gas prices to rise. Diesel in Oregon was steady at four-43 a gallon.