Circle K Inner Circle Fuel Day deal: See how to save 40 cents per gallon

Illinois drivers can take advantage of a limited-time deal today at the convenience store chain Circle K .

The chain, which has more than 4,000 stores in 22 states (including Illinois) is giving members of its Inner Circle loyalty program 40 cents off per gallon on Thursday, Aug. 21. The Inner Circle Fuel Day deal is good that day from 6 a.m. to 11:59 p.m. local time.

Here's how to take advantage of the deal.

How to get Circle K Inner Circle Fuel Day deal

To get the deal, customers must enter the phone number associated with their Inner Circle account at the gas pump or inside the store at checkout before their transaction. (Offer good at participating Circle K Fuel locations; one-time use only.)

Over the past 12 months, Circle K has had 40-cent price reduction Fuel Day promotio