The Weekly Fill-Up | February 23

February 23, 2026

As February winds down, fuel markets across South Dakota are reflecting a transitional moment. We’re not fully in spring mode, but we’re no longer in peak winter demand either. For Sioux Valley Coop patrons, this week presents an opportunity to reassess fuel and propane strategy before seasonal shifts begin to take shape.

Diesel fuel prices across the Midwest have remained relatively stable through the second half of February. While there has been minor week-to-week movement nationally, regional rack prices in the Upper Midwest have shown limited volatility. For local operations, this steadiness provides predictability — something that becomes increasingly valuable as planning begins for spring fieldwork. With fewer weather-related delivery disruptions in recent weeks due to milder conditions, this is a practical window to evaluate remaining winter fuel levels and begin positioning for early spring demand.

National distillate inventories have remained adequate, helping prevent sharp diesel spikes. However, refinery maintenance season is approaching — a period that typically begins in late February and extends into March. During this time, some refining capacity is temporarily reduced as facilities prepare for summer fuel blends. While this does not guarantee price increases, it historically tightens supply margins. For South Dakota fuel users, that means locking in upcoming diesel needs before field activity ramps up may provide added stability.

Propane markets continue to reflect a relatively balanced winter. National inventory levels entered the season in strong condition, and with above-average temperatures across much of the Midwest in recent weeks, residential and agricultural draw has moderated. Across South Dakota, this has helped maintain stable pricing and dependable availability. However, propane markets often shift quickly once seasonal agricultural demand re-enters the picture later this spring. For operations using propane for livestock facilities or rural heating, now is an ideal time to review tank levels and confirm delivery cadence before spring planting preparations shift attention elsewhere.

This week is also a useful checkpoint for evaluating storage capacity and delivery schedules ahead of the upcoming seasonal transition. March often brings fluctuating temperatures and unpredictable weather patterns. Confirming tank capacity, reviewing past consumption trends, and communicating anticipated needs with Sioux Valley Coop now helps reduce last-minute adjustments later.

The key takeaway for the week of February 23 is preparation through awareness. Diesel markets are steady but entering refinery maintenance season. Propane inventories remain supportive of stable pricing, aided by recent mild weather. For Sioux Valley Coop patrons, using this period to plan ahead for spring activity ensures smoother operations and continued reliability in the months ahead.

Sources

U.S. Energy Information Administration (EIA) – Weekly Petroleum Status Report
EIA Distillate Fuel Supply and Refinery Utilization Data
EIA Propane/Propylene Inventory Report
YCharts – Midwest Retail Diesel Price Trends