RE:RE:Why would anyone buy gas at at PetroCanada?PC Optimum alone . No PC credit card needed . However on occasion one may get bonus points using PC Credit card. One also earns points on the purchase paid with $$ . Imo dropped their own point program to merge it with pc optimum . here is how my purchase looked like . 42.135 litres at 151.9 64.00 even less 4.00 = 60.00 . Pts. redeemed 4000 . Pts. earned 420 so on net basis only used 3580 Pts.