NEVER use Olive oil to cook chinese food, smoking point too low.
Mastro - poor quality for its price, even on special,
President Choice - too expensive, even on special,
Bertolli - most Canadian as it is more accessable in supermarket, it was ~$15 for 3 litre at Loblaw few weeks ago, believe but not sure if it was extra virgin.
First generation Greek and Italian, bring their olive oil from home country every year. When they run out they buy olive oil in Jean Talon, Ville Anjou and Park Ex (the stores on the street - 1 block south of 40 and east of Rockland shopping centre. Get off at 2nd last bus stop of 55 bus(or 80 can't remember clear), or 1st bus-stop east of Rockland shopping centre <-- all my Greek and Italian friends go there). Lebanise buy theirs on Cote Vertu.