KATY, Texas — Most Americans would gladly pay the $4.29 for a gallon of regular gas Buc-ee’s was charging this week on Interstate 10 between Houston and San Antonio, more than 50 cents below the national average.But with prices more than $1.50 a gallon higher than they were a year ago, even Texans are complaining, and changing their buying habits to make do.“It makes me so stressed out just thinking about buying gas,” said Nancy Oncken, a retired kindergarten teacher, as she filled up her station wagon on her way to join five cousins at a water park outside San Antonio for the long weekend. “It’s now always in the back of my mind to be conservative about what I buy.”When Ms. Onck …
