You have until August the 29th to sign up for a coupon to save at Canadian Tire Gas Pumps. Be one of the first 3500 to share the offer and you will receive a coupon for gas. Every time the coupon is shared 750 times the savings will increase by $0.01, to a maximum savings of $0.07 per litre. This coupon will be valid from August the 31st to September the 2nd. Click here to participate!