Average retail gasoline prices in Oklahoma have fallen 2.0 cents per gallon in the past week, averaging $1.80/g yesterday, according to GasBuddy's daily survey of 2,294 gas outlets in Oklahoma. This compares with the national average that has fallen 1.7 cents per gallon in the last week to $2.13/g, according to gasoline price website GasBuddy.com.

Including the change in gas prices in Oklahoma during the past week, prices yesterday were 3.7 cents per gallon lower than the same day one year ago and are 17.5 cents per gallon lower than a month ago. The national average has decreased 8.6 cents per gallon during the last month and stands 5.4 cents per gallon higher than this day one year ago.

According to GasBuddy historical data, gasoline prices on November 21 in Oklahoma have ranged widely over the last five years:

$1.84/g in 2015, $2.62/g in 2014, $2.89/g in 2013, $3.14/g in 2012 and $3.15/g in 2011.

Areas nearby Oklahoma and their current gas price climate:

Oklahoma City- $1.78/g, down 0.7 cents per gallon from last week's $1.79/g.

Tulsa- $1.76/g, up 1.1 cents per gallon from last week's $1.75/g.

Amarillo- $1.79/g, down 6.1 cents per gallon from last week's $1.85/g.

"As motorists pack their bags and prepare to head out for Thanksgiving, gas prices are falling across much of the country," said Patrick DeHaan, senior petroleum analyst for GasBuddy. "With a record amount of travelers, motorists will be facing congestion not only on highways but gas stations. But at least low gas prices have lingered for much of this year. Keep an eye on word from OPEC over the holiday weekend- there could be some surprises at a major meeting to decide the fate of an oil production cut."

"But no matter what eventually takes place with the OPEC meeting, motorists are virtually guaranteed another year of gas prices that will remain well under all-time record highs as oil prices will likely remain confined between $40 and $60 for much of the next year," he added.