Reason No. 2: Oil price has been falling
One of the primary reasons your gas prices rise or fall is the fluctuation in the price of crude oil. U.S. refineries buy several million barrels of oil every day to supply the world's biggest economy, so even small price changes make a big difference.
When crude oil prices go up or down, gas prices tend to follow. And right now, oil prices are on the decline.
Oil prices have been falling for several reasons, including the increased U.S. crude production and an outlook for weaker growth in global oil demand. Meanwhile, the Organization of the Petroleum Exporting Countries, or OPEC, decided toward the end of 2014 not to manipulate prices by restricting oil production.
Overall, government energy forecasters expect crude prices to be significantly lower in 2015. The Energy Information Administration says the U.S. benchmark price could drop to $62.75 per barrel in 2015 -- a 33 percent discount from 2014. That means refineries would pay less for crude oil, and at least some of that savings should be passed on to drivers in the form of cheaper gasoline.