EUGENE, Ore. – Average gasoline prices in Eugene have fallen 3.0 cents per gallon in the last week, averaging $3.48/g Monday, according to GasBuddy’s survey of 78 stations in Eugene. Prices in Eugene are 11.2 cents per gallon lower than a month ago and stand 101.4 cents per gallon lower than a year ago. The national average price of diesel has declined 2.1 cents in the last week and stands at $3.55 per gallon.