Texas is one of the cheapest states for gas in the country, which makes sense when you think about it. The state produces more oil than any other in the US, has major refinery capacity along the Gulf Coast, and keeps its gas taxes low. That combination consistently puts Texas prices well below the national average.

Diesel prices in Texas are particularly important because the state has one of the largest trucking and agricultural industries in the country. Farmers, fleet operators, and construction companies here closely watch diesel prices, since fuel is one of their highest operating costs.

Prices still move up and down with national trends, and Texas isn't immune to refinery disruptions, especially around hurricane season when Gulf Coast facilities can shut down or slow production. But even in those situations, Texas tends to recover faster and stay cheaper than most states.