The Weekly Fill-Up | July 13-17

July 13, 2026

If you’ve been watching fuel headlines lately, you’ve probably noticed something that seems confusing: crude oil prices haven’t moved dramatically, yet diesel markets have become much more volatile. That’s because crude oil is only one piece of the equation. This week, the bigger story is what’s happening to refined fuels—and diesel is at the center of it.

Over the past several weeks, diesel prices have become increasingly sensitive to events affecting refineries rather than oil production itself. Recent international supply disruptions have reduced diesel exports from key global suppliers, while demand has remained strong in North America and Europe. As a result, diesel futures have climbed much faster than crude oil prices, highlighting that the market is being driven by refining capacity and available finished product instead of simply the cost of crude oil.

For producers across eastern South Dakota, this distinction matters. A barrel of crude oil must still pass through a refinery before it becomes diesel fuel. Even if crude supplies remain adequate, interruptions to refining or reduced diesel exports can tighten the availability of finished fuel. That means local diesel prices can rise even when oil prices appear relatively stable.

Another trend worth watching is export demand for U.S. diesel. The United States has become one of the world’s leading suppliers of refined petroleum products, and international buyers continue to look to U.S. refineries to replace lost supplies elsewhere. Government forecasts indicate U.S. net exports of petroleum products remain near record levels, with diesel making up a significant share of those exports. Strong overseas demand supports refinery activity but can also reduce the amount of diesel available in domestic inventories.

Fortunately, refinery utilization within the United States remains exceptionally strong. Most refineries are operating at high capacity to meet both domestic and international demand, helping offset some of the pressure created by global supply disruptions. High utilization rates generally support reliable fuel availability across the Midwest, although they leave less room for unexpected maintenance or weather-related interruptions.

For agricultural operations, July also marks a change in how diesel is consumed. Rather than concentrated planting demand, fuel is now supporting spraying, haying, irrigation, livestock operations, road maintenance, and equipment transportation. These activities create a steadier pattern of consumption that extends through much of the summer. Maintaining adequate on-farm storage becomes especially valuable because it allows operations to stay productive during busy weeks without relying on last-minute deliveries.

Propane markets continue to provide encouraging news. Summer inventory injections remain on track, and national storage levels continue building ahead of the upcoming heating season. With seasonal demand remaining relatively low, propane supplies throughout the Midwest remain well positioned entering the second half of the summer.

The key takeaway this week is that today’s diesel market is being shaped as much by refining and global trade as it is by crude oil production. While Sioux Valley Coop continues to have dependable supply for local patrons, the broader market reminds us that fuel pricing depends on far more than the price of a barrel of oil. Understanding those dynamics helps explain why diesel can sometimes move independently from the headlines about crude oil and why planning ahead remains one of the best strategies throughout the summer season.

Sources

U.S. Energy Information Administration (EIA) – Weekly Petroleum Status Report
U.S. Energy Information Administration – Short-Term Energy Outlook
Reuters – U.S. diesel futures and global diesel export developments
Reuters – International Energy Agency refined fuel market outlook
Financial Times – Global refinery and diesel supply analysis