A few months ago, Petro-Canada aggressively advertised their 5¢ fuel savings card on the radio. Because gas was so high (remember the days of $1.30/L??), I suspect they felt they could draw a lot of business from the discount. Recently, those ads have disappeared, and really it’s to no one’s surprise. With gas around 80¢, you’re getting a 6% discount; and that’s on top of the 40% discount you’re getting on gas now compared to a few months ago!