Regan Brown
Diesel fuel is the second most-used transportation fuel in California, with 3.5 billion gallons sold in 2024. It powers nearly all heavy-duty vehicles, from trucks and buses to trains and ships. In 2025, the average diesel price in California was $1.22 per liter, with a minimum of $1.20 and a maximum of $1.24. This fuel is also available in renewable forms, which are derived from biomass and provide economic benefits under the Low Carbon Fuel Standard.
| Characteristics | Values |
|---|---|
| Average diesel price | $1.22 per liter |
| Minimum diesel price | $1.20 per liter |
| Maximum diesel price | $1.24 per liter |
| Date range | 10 February 2025–19 May 2025 |
| Diesel as a percentage of total fuel sales in California | 17% |
| Amount of diesel sold in California in 2024 | 3.5 billion gallons |
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What You'll Learn
Average diesel price: 1.22 per litre
Diesel fuel is a widely used fuel in California, with nearly all heavy-duty trucks, delivery vehicles, buses, trains, and even boats and ships relying on it. While diesel prices can fluctuate, as of May 19, 2025, the average diesel price in California stood at 1.22 dollars per liter. This price places California among the states with more expensive diesel costs when compared to the national average.
The cost of diesel fuel is an important consideration for consumers, businesses, and the economy at large. With diesel being the second-largest transportation fuel used in California, price movements can have a significant impact on the state's transportation and logistics industries. The average diesel price of 1.22 dollars per liter includes taxes and reflects the costs incurred by retailers in procuring the fuel from various sources.
Diesel prices can vary across different regions within California due to various factors such as local taxes, transportation costs, and the number of retailers in an area. Generally, more urbanized and populated areas may experience slightly higher diesel prices compared to rural regions. However, the 1.22 dollars per liter average provides a statewide perspective on diesel costs.
While the average diesel price in California was 1.22 dollars per liter, it is essential to understand that diesel prices can change rapidly. Various factors, including global oil prices, refinery production, and even seasonal demand, can influence the price. For instance, during the observed period from February 10 to May 19, 2025, the minimum diesel price was 1.20 dollars per liter, while the maximum price reached 1.24 dollars per liter.
The diesel fuel market in California is dynamic and responsive to various economic and industry factors. The average diesel price of 1.22 dollars per liter serves as a benchmark for consumers and businesses alike. By staying informed about diesel prices, individuals can make more informed transportation and budgeting decisions, while businesses, especially those in the transportation sector, can adjust their operations and pricing strategies accordingly.
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Minimum price: 1.20 on 17 March 2025
Diesel fuel is the second-largest transportation fuel used in California, with nearly all heavy-duty trucks, delivery vehicles, buses, trains, and ships relying on diesel engines to function. In 2024, an impressive 3.5 billion gallons of diesel fuel were sold in the state.
The price of diesel fuel in California has fluctuated over time, with the average price from 10 February 2025 to 19 May 2025 being 1.22 per liter. During this period, the minimum price was recorded at 1.20 per liter on 17 March 2025, while the maximum price reached 1.24 per liter on 24 February 2025. These prices are derived from various sources, including government records, regulatory agencies, petroleum companies, and major media outlets, offering a comprehensive view of the diesel market in California.
The minimum price of 1.20 per liter on 17 March 2025 can be considered a relatively low point within the given timeframe. It is important to acknowledge that fuel prices can be influenced by numerous factors, including market dynamics, supply and demand fluctuations, and broader economic trends. Local factors specific to California may also play a role, such as variations in taxation, distribution infrastructure, and the unique energy needs of the state.
California has shown a commitment to renewable energy sources, including renewable diesel. Renewable diesel is a biomass-derived transportation fuel suitable for diesel engines and is widely adopted in California due to economic incentives under the Low Carbon Fuel Standard. The state's efforts to diversify its energy portfolio and embrace renewable alternatives could have a long-term impact on diesel fuel pricing.
While the minimum price of diesel fuel in California on 17 March 2025 stood at 1.20 per liter, it is essential to monitor ongoing trends and factors influencing the market to make informed predictions about future price movements. Diesel fuel plays a significant role in California's transportation sector, and understanding its pricing dynamics is crucial for various industries and consumers alike.
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Maximum price: 1.24 on 24 February 2025
The price of diesel fuel in California has seen some fluctuations over time, with a range of factors influencing its cost. Data from Global Petrol Prices reveals that diesel prices in California reached a maximum of 1.24 per liter on February 24, 2025. This date marked a peak in diesel prices within the specified time frame.
Diesel fuel is a crucial component of California's transportation sector, powering a wide range of vehicles, including heavy-duty trucks, delivery vans, buses, trains, ships, and even military equipment. Its efficiency and engine-prolonging properties make it a preferred choice for many industries. In 2024, California sold 3.5 billion gallons of diesel, showcasing the fuel's significance in the state's economy and transportation network.
The maximum price of 1.24 per liter on February 24, 2025, represents a notable increase from the average diesel price during the period from February 10 to May 19, 2025, which stood at 1.22 per liter. This average price included a minimum price of 1.20 per liter on March 17, 2025. The data provides insight into the dynamic nature of diesel pricing, which can be influenced by various market forces, supply and demand dynamics, and even seasonal variations.
It is worth noting that California has embraced renewable diesel as a commercially viable alternative. Renewable diesel is derived from biomass and offers economic advantages under the Low Carbon Fuel Standard. Nearly all domestically produced and imported renewable diesel is utilized in California, showcasing the state's commitment to exploring sustainable alternatives to traditional diesel fuel. The adoption of renewable diesel and the pursuit of lower carbon emissions present potential factors that could shape the future of diesel pricing in California.
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$64.25 $82.67
Diesel fuel sales: 3.5 billion gallons in 2024
According to the California Department of Tax and Fee Administration, 3.5 billion gallons of diesel fuel were sold in California in 2024. This figure includes off-road diesel. Diesel fuel is the second-largest transportation fuel used in California, accounting for 17% of total fuel sales, with gasoline making up the majority of sales.
Diesel is the preferred fuel for heavy-duty vehicles, delivery vehicles, buses, trains, ships, boats, and barges, as well as farm, construction, and military equipment. This is due to its higher energy content per gallon compared to gasoline and its ability to prolong engine life. The introduction of ultra-low-sulfur diesel and renewable diesel has also made diesel engines more environmentally friendly.
The high demand for diesel fuel in California is reflected in the sales figures. With increased travel and a growing trend towards heavy-duty vehicles, the state's diesel consumption is expected to remain high. Additionally, California's economic benefits under the Low Carbon Fuel Standard have led to the widespread use of renewable diesel in the state.
While the exact price of diesel fuel in California at the time of the 3.5 billion-gallon sales figure is unclear, the U.S. Energy Information Administration (EIA) predicted an average on-highway diesel price of $3.70 per gallon for 2024. This forecast was made based on expectations of lower demand and high production, contributing to a decline in diesel prices from 2022 to 2024.
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Diesel engines: used in heavy-duty trucks, buses, trains, boats, farm vehicles, etc
As of June 2023, diesel fuel costs an average of $5.15 per gallon in California. Diesel engines are used in a variety of vehicles, including heavy-duty trucks, buses, trains, boats, and farm vehicles. Each use case has unique requirements and considerations for their diesel engines.
For heavy-duty trucks, diesel engines are valued for their power and torque, which are essential for hauling heavy loads. Truck manufacturers like Freightliner and Kenworth utilize diesel engines from companies like Detroit Diesel and Cummins. The DD15 engine from Detroit Diesel is widely regarded as one of the best options for heavy-duty trucks.
Buses, particularly those used for city transit, often rely on diesel engines as well. These engines are typically well-maintained and undergo regular service intervals to prolong their lifespan. City buses may have lower gearing to accommodate slower driving speeds and are tuned for low RPM torque.
Trains, or more specifically, locomotives, have historically utilized diesel engines. The first diesel-hydraulic locomotive was built in Germany in 1935, and diesel-electric railroad locomotion entered mainline service in the United States in the 1930s. Diesel locomotives offer advantages in terms of performance and efficiency compared to their steam-powered predecessors.
In the marine industry, diesel engines are commonly used for propulsion in both recreational and commercial vessels. Companies like YANMAR specialize in providing innovative and efficient diesel engines for sailboats and powerboats.
Farm vehicles, such as tractors, may also be powered by diesel engines. These engines are typically smaller in displacement and have lower horsepower compared to those used in larger vehicles. However, they are built to be tough and durable to handle the unique demands of agricultural work.
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Frequently asked questions
As of May 19, 2025, the average cost of diesel fuel per liter in California is 1.22, with a minimum of 1.20 on March 17, 2025, and a maximum of 1.24 on February 24, 2025.
As of 2024, the California Department of Tax and Fee Administration reported that 3.5 billion gallons of diesel fuel were sold, but the cost per gallon was not specified.
Unfortunately, I cannot answer this question as I do not have information on diesel fuel prices in other states.
On February 24, 2025, diesel fuel prices reached a maximum of 1.24 per liter, which is the highest price recorded during the period from February 10, 2025, to May 19, 2025.
Ultra-low sulfur diesel is the standard type of diesel fuel used in California. It was nationally introduced in 2006, and by 2007, nearly all heavy-duty diesel engines were using this type of fuel.
