Thumb Score: +12 be excited! :whee: Save 40¢/gallon on fuel for your Memorial Day weekend!. Nationwide Circle K gas stations have brand-name fuel (i.e. Shell, Mobil, etc)....depends on which location. On Thursday, May 23rd between 4:00 pm - 7:00 pm at your participating neighborhood Circle K store, customers filling up will see .40¢ off per gallon for regular, premium and supreme reflected at the pump.