Gas prices and quality differ from city to city and state to state. Here's everything you need to know about how gasoline in the U.S. works. RELATED:
Gas prices have continued to increase around the nation as a lot of Americans head out for summer road trips.
The national average price for a gallon of regular gasoline was $3.16, up two cents from last week. Drivers were paying an average of $2.20 a gallon a year ago at this time.
Analysts say high crude oil prices will likely keep prices at the pump above $3 per gallon through the rest of the summer driving season.
» Subscribe to USA TODAY:
» Watch more on this and other topics from USA TODAY:
» USA TODAY delivers current local and national news, sports, entertainment, finance, technology, and more through award-winning journalism, photos, videos and VR.