It's a dirty business that is highly wrapped up in politics...look at what we did to Putin in order to keep oil trading worldwide in US Dollars.
I personally think fuel is about to do another major spike since that short term drop was really nothing more than a break on what is a restless society and broke economy. Now that competition in the oil market is low, fuel will do what it always does...go up. My opinion, no expert by any means.
I would rather look at other investments in alternative energy that is producing like solar, hydro, and wind. Lots of great industry that is growing and probably a more stable way of making money than traditional hydrocarbon fuels. Sure it could go up, could also drop out. Gotta love gambling