Chicago is No. 1 ... in gas prices.
The second city surpassed Los Angeles this week as the most expensive in the nation to fill up your tank.
The website Gasbuddy.com reports a gallon of regular gasoline here in Chicago runs an average of $4.50, which is about .65 cents higher than the national average. Los Angeles averages about $4.25 per gallon of regular.
To make things worse, NBCChicago found some stations in the city selling gas close to $4.90 Friday morning.
Gas prices around Chicago have risen more than $.70 a gallon over the past five weeks.
Experts blame the spike on growing demand from Asia, volatility in the Middle East, and gas stations switching to summer-blends, which are more expensive.
They predict gas prices will continue to rise in the coming days.