Average gasoline prices in Oklahoma have fallen 11.1 cents per gallon in the last week, averaging $3.60/g today, according to GasBuddy's survey of 2,294 stations in Oklahoma. Prices in Oklahoma are 13.0 cents per gallon higher than a month ago and stand 18.4 cents per gallon higher than a year ago. The national average price of diesel has risen 9.9 cents in the last week and stands at $4.53 per gallon.