Bill McBride referenced a part of Professor Hamilton’s lecture at Econbrowser: Lower gasoline prices. Gasoline prices are always a hot topic in daily life. Slight fluctuations may lead to a huge influence in the society. The price for gasoline in States hit a lowest point in three years.
Professor explained why the changes in production of crude oil would not bring real changes to the gasoline market price. The increase in production will never cover the increase of emerging consumption. This is why the gasoline price does not change with the price of crude oil. Based on this theory, I think this also can explain why there is a huge gap between gasoline prices in Canada and States. Even though Seattle and Vancouver are only about 200 km away, the difference in gasoline prices in two cities is likely to be 50 cents per litre.
It is reasonable to conclude that the decreased production rate for sure will rise the gasoline price, but the increase in production rate will not necessarily lower the gasoline price. The reason is that demand in different area variates depending on time.
Source: http://www.calculatedriskblog.com/2013/11/sunday-night-futures.html