Changes in gasoline and diesel prices mirror those of crude oil prices, which are determined in the global crude oil market by the worldwide demand for and supply of crude oil.
- Per-barrel costs for crude oil – the No. 1 factor in the cost of producing gasoline and diesel – reflecting the global oil supply/demand balance and inventories, among other factors.
- Solid economic growth, driving U.S. petroleum demand (20.5 million barrels per day in Q2 2019) to its highest level since 2007 - up by 178 thousand barrels per day from Q1 2019.
- 汽油价格（2019年6月全国平均每加仑2.72美元）AAA) have decreased 6 percent year-on-year in tandem with Diesel and Crude oil prices.
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