Shares of Imperial Oil (IMO) have been strong performers lately, with the stock up 8.8% over the past month. The stock hit a new 52-week high of $92.33 in the previous session. Imperial Oil has gained 47.6% since the start of the year compared to the 4.3% move for the Zacks Oils-Energy sector and the 14.6% return for the Zacks Oil and Gas - Integrated - Canadian industry.What's Driving the Outperformance?The stock has an impressive record of positive earnings surprises, as it hasn't missed our earnings con ...