The Triple-A Texas Weekend Gas Watch says the statewide average gas price in Texas is $3.80 a gallon for regular unleaded. That price is up two-cents from a week ago, and is a $1.22 more than a year ago. The national average is $4.14. Gasoline supply and demand are both slightly down, but fluctuating crude prices are pushing up the price of gasoline. The average price at the pump in San Antonio is $3.69.