Contest closes November 10, 2008 at 11:59 pm. Contest open to Canadian residents over the age of majority in their province or territory of residence. One entry per person. Odds of winning depend upon the number of eligible entries received. Mathematical skill-testing question to be correctly answered to win. No purchase necessary. The Grand Prize is based on an average of 1,200 litres of fuel consumed per year and two oil changes per year; the Grand Prize will consist of 40 x $50 gift cards amounting to $2000. Esso Gift Cards are redeemable for products and merchandise at any participating Esso service station in Canada. The Grand Prize is subject to the Esso Gift Cards terms and conditions, please refer to the official website for more information: www.essogiftcard.ca. © 2008 Imperial Oil Limited. Mobil, Mobil Super, Mobil 1 and the flying horse design are trademarks of Exxon Mobil Corporation or one of its subsidiaries; Imperial Oil, licensee. NASCAR is a registered trademark of The National Association for Stock Car Auto Racing Inc. Esso and the Esso oval are trademarks of Imperial Oil Limited; Imperial Oil, licensee.