Bought a $50 Shell gas card at Winn-Dixie and received $.20 off per gallon (Fuel Perks plus some bonus points). I then went to a Shell that had gas at $1.87 (cash or Shell credit card price). I went in and asked if the Shell gift card counted as cash and the rep said no. I tried it and it did register the cash price! I paid only $1.67 a gallon today without even buying any groceries.
Go out today and get a great deal!