I always use SHELL! Decided to use the 4cents off coupon to fill my car up with regular gasoline to help bring down the price. I noticed right away after 2 drives into Calgary and back to Cochrane how much fuel burn the Safeway gasoline went through. It's doesn't hold a candle to the efficiency of SHELL FUEL. It's not saving 4cent at the pump at Safeway when you need to refuel often there. I will pay a little more to see those pumps way less.:)