One of the major factors in the price of gasoline is supply and demand of gasoline. Not supply and demand of crude oil, that is a different commodity. 

Remember that crude oil has to be refined into gasoline and there is a limited amount of refineries capable of doing that.  I believe there has been only one new refinery constructed in Canada in the last 20 or 30 years, and the one constructed was to refine diesel. 

Nobody wants to have a refinery near them, and for many years refining margins were non existent so it limits the desire or ability to create new refining capacity. 

Ergo, there is very little relationship between the price of crude and the price of refined products.  Limited supply and increasing demand of any commodity will result in strong prices for that commodity.