Record Diesel Prices Raise Food Inflation Risks Across the U.S. and Africa

WASHINGTON / NAIROBI — Surging diesel prices are placing additional pressure on farmers, freight operators and businesses as disruptions across global energy markets raise the cost of moving goods. The pressure is particularly significant for agriculture, where fuel is essential for machinery, harvesting, storage and transportation.

A September 18 report by Reuters highlighted the strain facing U.S. farmers during the harvest season, with diesel costs increasing sharply from a year earlier. The developments offer a broader warning for food supply chains, including markets in Africa, where transport expenses, currency movements and fuel-import exposure can influence the prices paid by consumers.

For Kenya and Nigeria, the impact extends beyond the filling station. Higher diesel prices can affect farm operations, public and private transport, manufacturing, electricity generation, logistics and the distribution of essential goods.

U.S. Farmers Face Rising Fuel Expenses During Harvest

Farmers across the United States are navigating higher diesel expenses at a time when agricultural operations require substantial fuel consumption. Harvesting machinery, tractors, trucks and other equipment depend on reliable access to fuel.

Reuters reported that farmers in Missouri and South Dakota were experiencing significant cost pressures. One farmer cited in the report operates combines, semi-trucks and tractors during the harvest season, while another estimated that fueling a single combine could cost as much as $1,500 per day—approximately twice the previous year’s expense.

These costs create a difficult situation for agricultural businesses. Harvesting cannot simply be postponed because fuel becomes expensive. Farmers must continue operating machinery to protect their crops, transport produce and meet seasonal production requirements.

Higher fuel expenses can reduce operating margins and influence decisions about machinery use, maintenance and other farm expenditures. In some cases, farmers may attempt to compensate for fuel increases by reducing spending elsewhere, delaying investments or using older equipment.

The pressure can also extend into the next growing season. If farmers experience reduced profitability, higher fuel costs may affect their ability to purchase seed, fertilizer and other inputs.

Why Expensive Diesel Can Increase Food Prices

Diesel plays a central role in the food supply chain. It powers agricultural equipment and many of the trucks that transport food between farms, storage facilities, distribution centres and retailers.

When diesel becomes more expensive, the additional cost can enter several stages of the supply chain:

1. Farm production: Fuel is used to operate tractors, combines, irrigation equipment and other machinery.
2. Post-harvest handling: Agricultural products may require transport, refrigeration, storage and processing.
3. Freight transportation: Trucks use diesel to move food over long distances between production areas and urban markets.
4. Wholesale and retail distribution: Higher delivery costs can increase expenses for distributors, supermarkets and other businesses.

The effect on consumer prices is not necessarily immediate or uniform. Some companies may absorb part of the increase, while others may pass additional expenses to customers. Existing transport contracts, inventory levels, competition and the availability of alternative suppliers can influence the timing and size of price adjustments.

Fresh produce, dairy and meat may face particular logistical challenges because certain products require refrigerated transportation and timely delivery. However, diesel costs are only one component of food prices. Weather, labour, fertilizer, exchange rates, supply availability and consumer demand also influence the final cost.

Kenya: Diesel Prices Remain a Major Cost for Transport and Agriculture

Kenya’s economy is highly dependent on road transportation for the movement of agricultural products, manufactured goods and consumer supplies. As a result, changes in diesel prices can affect businesses across multiple sectors.

According to the Energy and Petroleum Regulatory Authority (EPRA), the maximum retail diesel price in Nairobi for the period from September 15 to October 14, 2026, is KSh 217.86 per litre. The maximum price in Mombasa is KSh 214.58 per litre, while Nakuru is listed at KSh 217.27 per litre.

These are regulated maximum retail prices for the specified pricing period. Actual expenses can vary according to location, consumption, transport arrangements and the type of commercial operation.

Kenya’s diesel prices are influenced by international petroleum costs, shipping and import expenses, exchange-rate movements, taxes, levies and the domestic pricing framework. The country imports a substantial share of its refined petroleum products, making external market developments important for local fuel costs.

How Higher Diesel Prices Affect Kenya

Agriculture: Farmers use diesel-powered machinery and transport services to prepare land, harvest crops and deliver produce to markets. Increased fuel costs can raise production expenses, particularly for commercial farms and operators using mechanised equipment.

Food distribution: Kenya’s agricultural supply chains connect rural production areas with urban markets, including Nairobi and other population centres. More expensive transportation may increase the cost of moving vegetables, cereals, dairy products and other food items.

Logistics and small businesses: Transport operators, delivery businesses and companies that depend on diesel-powered equipment may face higher running costs. Businesses with limited pricing flexibility may experience pressure on their profit margins.

Household budgets: If higher distribution costs are transferred to consumer prices, households may need to spend more on essential goods. The scale of the effect depends on fuel-price changes, competition, supply conditions and the ability of businesses to absorb additional expenses.

Kenya’s experience illustrates how international energy disruptions can affect an economy even when the original disruption occurs outside the country.

Nigeria: Diesel Market Volatility Raises Business Concerns

Nigeria is an important oil-producing country, but the availability and cost of refined petroleum products are affected by domestic production, refinery operations, imports, distribution networks and international market conditions.

Diesel, commonly referred to as Automotive Gas Oil (AGO), is widely used by businesses, transport operators and organisations that rely on diesel-powered generators and equipment.

Data published by GlobalPetrolPrices on September 14, 2026, put Nigeria’s diesel price at approximately ₦1,902.50 per litre. The same source reported an increase from ₦1,662.50 one month earlier and ₦973 one year earlier. These figures are third-party price estimates and should be distinguished from individual filling-station prices, depot prices and official statistical releases.

Additional September reporting indicated that diesel prices in some Nigerian locations had exceeded ₦2,000 per litre. A September 16 report by Vanguard cited diesel prices reaching as high as ₦2,300 per litre at some filling stations and depots, while prices varied among suppliers and locations.

The differences between published figures demonstrate why diesel prices in Nigeria should be assessed by date, location, supply point and measurement type. A depot price is not necessarily the same as the final retail price paid by a consumer.

Implications for Nigeria’s Economy

Higher diesel costs can be particularly significant for businesses that rely on generators to supplement electricity supply. When fuel becomes more expensive, companies may face increased expenses for production, refrigeration, telecommunications, retail operations and other services.

Transport businesses may also encounter higher costs when moving goods between ports, industrial centres, farms and markets. The resulting pressure can affect the prices of manufactured products, agricultural goods and services.

Nigeria’s domestic refining capacity could improve supply resilience over time, but refinery output, crude availability, product distribution and pricing arrangements remain important variables. Domestic oil production alone does not guarantee low diesel prices because refined-product costs depend on more than the location where crude oil is extracted.

Africa’s Broader Exposure to Rising Diesel Costs

Diesel-price pressures are not limited to Kenya and Nigeria. Across Africa, the effect of higher fuel costs varies according to each country’s energy infrastructure, petroleum-import dependence, exchange rate, tax structure and domestic production capacity.

Countries that rely heavily on imported refined fuel may be exposed to international shipping costs, refinery disruptions and currency depreciation. In landlocked markets, the cost of moving fuel through neighbouring countries can add another layer of expense.

South Africa provides another example of diesel-market pressure. September 2026 fuel-price reporting indicated a substantial increase in diesel wholesale reference prices, with the 50ppm inland reference reaching R29.56 per litre and the coastal reference R28.68 per litre.

In Ghana, Reuters reported that BOST Energies reduced diesel and gasoline exports to Burkina Faso and Mali amid supply pressures, prioritising domestic availability. Such developments demonstrate how fuel shortages and supply constraints can affect trade between countries.

The consequences for African consumers and businesses are not identical. Some governments may use taxes, subsidies, price controls or other interventions to moderate the impact, while these policies may also affect public finances, fuel availability and market incentives.

WTI and the U.S. Crude Oil Production Question

The United States is one of the world’s major crude oil producers, and West Texas Intermediate (WTI) is a key benchmark used in global oil markets. WTI prices help market participants assess the value of U.S. crude and influence expectations about energy costs.

However, the relationship between crude oil production and diesel prices is not direct.

Crude oil must be processed in refineries to produce diesel and other petroleum products. The final price of diesel depends on crude costs, refinery margins, product supply, distribution expenses, taxes and market conditions.

The U.S. Energy Information Administration explained on September 18 that diesel prices are influenced by crude oil prices, retail margins, distribution costs, taxes and refining margins, often assessed through crack spreads.

A country may produce significant volumes of crude oil and still experience expensive diesel if refining capacity is constrained, inventories are low, transportation routes are disrupted or demand for refined products exceeds available supply.

Why Higher U.S. Production May Not Immediately Lower Diesel Prices

Increased U.S. crude production could contribute to supply availability, but its effect on diesel prices depends on several conditions:

• Refining capacity: More crude does not automatically mean more available diesel. Refinery throughput and operating conditions matter.
• Product demand: Demand for diesel from trucking, agriculture, construction and industry can influence market tightness.
• Global trade: U.S. refineries and fuel suppliers participate in international markets. Export flows can influence domestic and overseas availability.
• Refining margins: A rise in the price of refined diesel relative to crude can increase fuel costs even when crude prices are not rising at the same rate.
• Geopolitical disruptions: Damage to refineries, shipping restrictions and supply interruptions can affect refined-product markets across regions.

WTI is therefore useful for analysing the crude oil component of fuel pricing, but it should not be treated as a standalone predictor of retail diesel prices.

Looking Forward: What Could Happen to Diesel Prices?

The outlook for diesel prices will depend on the interaction between global crude supply, refinery availability, demand and geopolitical developments.

One possibility is that supply disruptions ease and refinery operations improve. In that scenario, diesel availability could strengthen and refining margins could moderate, potentially reducing some of the pressure on fuel prices.

Another possibility is that disruptions continue or expand. If refinery outages, shipping constraints or crude supply interruptions persist, refined-product prices could remain elevated even if some crude production increases.

U.S. crude production may provide an important source of supply resilience, but the benefits for diesel markets depend on how efficiently crude is processed and how refined products move through domestic and international markets.

For Kenya and other fuel-importing economies, the exchange rate remains an additional consideration. Even if international crude prices stabilise, currency depreciation can increase the local-currency cost of imported petroleum products. Conversely, favourable exchange-rate movements and lower landed costs may help reduce price pressures, depending on the domestic pricing mechanism.

Businesses and households should therefore avoid assuming that a temporary decline in WTI will immediately translate into lower diesel prices. The timing and scale of any change will depend on the broader petroleum supply chain.

Conclusion: Diesel Costs Remain a Key Economic Indicator

Rising diesel prices highlight the connection between energy markets, agriculture, transportation and household affordability. Higher fuel costs can place pressure on producers and businesses before the effects become visible in consumer prices.

The experience of U.S. farmers, alongside diesel-price developments in Kenya, Nigeria and other African markets, shows why refined fuel supply is an important economic consideration. Oil production, refinery capacity, transport infrastructure and currency conditions all contribute to the final cost of diesel.

As markets respond to geopolitical uncertainty and changing supply conditions, monitoring both crude benchmarks such as WTI and refined-product indicators will be essential for understanding the direction of energy-related inflation.