EUGENE, Ore. – Average gasoline prices in Eugene have fallen 0.9 cents per gallon in the last week, averaging $3.57/g Tuesday, according to GasBuddy’s survey of 78 stations in Eugene. Prices in Eugene are 6.6 cents per gallon lower than a month ago and stand 108.8 cents per gallon lower than a year ago. The national average price of diesel has declined 0.2 cents in the last week and stands at $3.65 per gallon, a fresh multi-year low.