This was the first giveaway since Gov. JB Pritzker signed the state budget which includes relief from the gas tax across the state.
Drivers were asked not to line up at the stations overnight. There was just one entry and exit point at each spot in hopes of avoiding traffic issues.
Each car was allowed to fill up to $50 in gas and stickers will be used to represent each position in line. Traffic aides were on site to keep things moving.
The free gas was expected to last about four to five hours at each station.
Chicago gas giveaway locations
Super Save, 48 E. Garfield Blvd.
Citgo, 1345 N. Pulaski Rd.
Super Save, 6659 S. Halsted St.
Super Save, 11100 S. State St.
Mobil, 2801 S. Pulaski Rd.
Mobil, 603 S. Independence Blvd.
BP, 7600 S. South Chicago
The Ruox, 7051 S. Western Ave.
BP, 101 N. Western Ave.
Clark, 1952 W. Garfield Blvd.
Amoco, 7201 N. Clark St.
Marathon, 340 Sacramento Blvd.
Shell, 5230 S. Western
Golo, 1958 W. 47th St.
BP, 5201 W. Jackson Blvd.
Amoco, 4402 W. Roosevelt Rd.
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Suburban Chicago gas giveaway locations
Evanston: Mobil, 1950 Green Bay Rd.
Maywood: Super Save, 101 W. Madison
Burbank: BP, 5149 W. 79th St.
Hillside: 4804 Butterfield Rd.
Calumet Park: Citgo, 11900 S. Marshfield Ave.
Cicero: Mobile, 5800 E. Cermak Rd.
Schiller Park: Phillips, 9340 Irving Park Rd.
University Park: BP, 450 S. Cicero
Berkeley: Shell, 5630 St. Charles
Oak Park: Shell, 6129 W. North Ave.
Northlake: Sav A Stop, 300 E. North Ave.
Wilson jumped into the 2023 mayoral race on April 11 with a $5 million contribution to himself and a burst of goodwill generated by his gas giveaways.
Three years ago, Wilson won 13 of 18 Black wards, finishing fourth overall with 10.6% of the vote. In the runoff, Lori Lightfoot won all of those wards - and all 50 wards citywide -after Wilson endorsed her over County Board President Toni Preckwinkle.
Wilson said Illinois drivers pay the second highest taxes at the pump in the nation.
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The state tax accounts for 39 cents per gallon, the city adds 8 cents per gallon and Cook County adds 6 cents, along with sales tax.
Sun-Times Media contributed to this report.