I live in th North Suburabs of Chicago, A Friend of mine had a company car and had an errand to run on, I went with them just to go, we passed countless Stations both Name ie: Philips, Citgo ect to smaller owned ones and I the prices for regular unleaded where any wherefrom $3.85 to $4.25, but keep in mind Cook County Illinois, Specificly the City of Chicago has a Gas tax so gas within the Chicago city limits I have seen as high as $4.50-$4.75 for regular but as low as $4.00