
Reefer fuel is used to power the refrigeration units of specialised vehicles that transport perishable goods, such as food, chemicals, and medications. These vehicles, known as reefers, have two fuel storage tanks: one for the engine and one for the refrigeration unit. Reefer fuel is specifically designed for refrigeration systems, with a lower energy density and higher flash point than regular diesel or tractor fuel. Using the wrong type of fuel can lead to engine damage or failure, or even the risk of fire. Reefer fuel typically costs less than diesel or tractor fuel due to its exemption from road taxes, as it is intended for off-road use only. The average cost of reefer fuel is around $2.18 to $3 per gallon, and a full tank typically lasts between 3 to 5 days.
| Characteristics | Values |
|---|---|
| Usage | Powers the refrigeration units attached to reefer trailers |
| Tank capacity | 50-100 gallons |
| Fuel efficiency | 0.4-1.1 gallons of fuel per hour |
| Fuel cost | $2.18 to $2.81 per gallon |
| Fuel type | Diesel |
| Usage calculation | Hours instead of mileage |
| Re-filling frequency | Every 2-4 days |
| Fuel identification | Dyed red |
| Usage restrictions | Not to be used in vehicles driven on public roads |
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What You'll Learn
- Reefer fuel is for refrigeration, tractor fuel powers the truck
- Reefer fuel is dyed red to distinguish it from other fuel types
- Reefer fuel usage depends on the temperature and size of the load
- Reefer fuel is cheaper than tractor fuel as it's exempt from road tax
- Reefer fuel tanks vary in size, typically ranging from 50 to 100 gallons

Reefer fuel is for refrigeration, tractor fuel powers the truck
Reefer fuel and tractor fuel are two distinct types of diesel fuel with different purposes and legal uses. Reefer fuel is designed to power the refrigeration units of reefer trailers or trucks, which are vehicles used to transport perishable goods at controlled temperatures. The refrigeration unit operates independently of the tractor's main fuel tank, allowing the cargo to remain at the right temperature even when the truck is turned off. Reefer fuel is formulated to work effectively in colder temperatures and has a higher flash point than regular diesel fuel. It typically costs less than diesel fuel and is not subject to road tax, making it a cost-effective option for off-road vehicles and equipment. However, using reefer fuel on public roads can result in significant fines.
On the other hand, tractor fuel, also known as standard number two diesel, is designed to power the engines of heavy-duty vehicles such as trucks, semis, and construction vehicles. Tractor fuel is adapted to local climate conditions and can be used in any vehicle that runs on diesel. It is subject to road tax, which makes it more expensive than reefer fuel.
The reefer tank, which holds the reefer fuel, is usually separate from the tractor's main fuel tank and is located at the rear end of the trailer or truck. The size of the reefer fuel tank can vary, typically ranging from 50 to 100 gallons, although some tanks can be as large as 200 gallons. The fuel consumption of the refrigeration unit depends on factors such as the ambient temperature, the frequency of opening the trailer, the size of the load, and the age and manufacturer of the trailer.
Understanding the distinction between reefer fuel and tractor fuel is crucial for legal compliance and the proper functioning of reefer trailers or trucks. Reefer fuel is specifically designed for refrigeration, ensuring that perishable goods remain safe during transport, while tractor fuel powers the engine of the vehicle. By using the appropriate fuel for each component, drivers and fleet operators can maintain the quality of their cargo and avoid potential damage to their vehicles.
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Reefer fuel is dyed red to distinguish it from other fuel types
Reefer fuel is used to power the refrigeration units attached to reefer trailers, which are used to transport perishable goods like food, chemicals, and medications. These trailers have their own motor and reefer fuel tank, allowing cargo to remain at the right temperature even when the truck is turned off. Reefer fuel is formulated to work in colder temperatures and has a higher stability, ensuring the safe operation of the refrigeration unit.
Reefer fuel is distinct from the fuel used to power the engine of the truck. Reefer trucks have two fuel storage tanks, one for the refrigerator and one for the engine. Reefer fuel is typically dyed red to distinguish it from other fuel types, specifically diesel fuel used for on-road vehicles. This red dye indicates that the fuel is intended for off-road use and is therefore exempt from road taxes. The use of red dye serves as a marker to authorities, ensuring compliance and helping businesses avoid the expensive taxes associated with clear diesel.
The chemical composition of reefer fuel is similar to standard diesel, but it has a lower energy density and a higher flash point. Using regular diesel in a reefer unit can lead to engine damage or failure, and even the risk of fire. Reefer fuel is also known as red-dyed diesel, untaxed fuel, or off-road diesel fuel. The dye used is typically Solvent Red 26 or 164, representing high sulfur content. While reefer fuel is generally dyed red, this may vary depending on the specific state or country's regulations.
The cost of reefer fuel is typically lower than diesel fuel for vehicles, and as of October 2023, the average cost nationwide ranged from $2.18 to $2.81 per gallon. The fuel efficiency of a reefer trailer depends on various factors, including the size, weight, insulation, and type of refrigeration unit. Older trailers tend to use more fuel, with modern trailers being more efficient and consuming less fuel to maintain the desired temperature.
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Reefer fuel usage depends on the temperature and size of the load
Reefer fuel powers the refrigeration units attached to reefer trailers, which are used to transport perishable goods at controlled temperatures. These trailers have their own motor and reefer fuel tank, separate from the engine that powers the truck itself, to ensure the cargo remains at the right temperature even when the truck isn't running.
Reefer fuel usage depends on various factors, including the temperature required for the cargo, the size of the load, and the age and manufacturer of the trailer. The ambient temperature in the regions driven through can also impact fuel efficiency. Loads that need absolute temperature control need to be run on continuous mode, while those with variable temperature controls can be run under the reefer's auto settings.
The size of the load can impact fuel usage, as a larger load will require more cooling to maintain the desired temperature. Additionally, older trailers tend to be less fuel-efficient, with older models using between 1-3 gallons of reefer fuel per hour, while newer models use between 0.4-1.1 gallons per hour. The manufacturer of the trailer also plays a role, as different manufacturers may have different fuel efficiencies.
The size of the reefer fuel tank also affects fuel usage. Larger fuel tanks can hold more fuel, allowing for longer periods between fill-ups. Different manufacturers offer varying fuel tank sizes, with some tanks having a capacity of 50 gallons and others maxing out at closer to 100 gallons.
It is important to note that proper maintenance of the refrigeration unit is crucial. When the unit is not properly maintained, it works harder to maintain the desired temperature, resulting in increased fuel consumption and higher costs. Regular maintenance can help improve fuel efficiency and save money.
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Reefer fuel is cheaper than tractor fuel as it's exempt from road tax
Reefer fuel is used to maintain the temperature of perishable goods during transport, ensuring they remain safe and do not spoil. It is stored in a separate tank from regular fuel and powers the refrigeration unit attached to reefer trailers. These trailers have their own motor and fuel tank to keep cargo at the right temperature even when the truck engine is off. Reefer fuel is not used to power the engine and is only suitable for off-road vehicles.
Tractor fuel, on the other hand, is a type of diesel that powers the engines of heavy-duty tractors, trucks, and semis. It is designed to handle heavy loads and demanding tasks, generating significant torque at both high and low speeds. Tractor fuel is suitable for use on public roads, whereas reefer fuel is not.
The main difference between the two types of fuel is that reefer fuel is exempt from road tax, making it a more cost-effective option for off-road vehicles. Reefer fuel is dyed red to distinguish it from standard fuel types. As it is not subject to road tax, reefer fuel has a lower price per gallon than tractor fuel. This makes it a popular choice for off-road vehicles, helping them save money on fuel costs.
The cost of reefer fuel per gallon is approximately $2.97 to $2.99, while tractor diesel costs around $5.60 per gallon. This significant difference in price can result in substantial savings for off-road vehicles. For example, a typical Kubota truck can save up to $3,900 by using reefer fuel instead of tractor fuel.
In summary, reefer fuel is cheaper than tractor fuel because it is exempt from road tax. It is designed for a specific purpose—to maintain the temperature of perishable goods during transport. By understanding the differences between reefer and tractor fuel, vehicle owners can make informed decisions to ensure smooth and efficient operations.
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Reefer fuel tanks vary in size, typically ranging from 50 to 100 gallons
Reefer fuel is used to power the refrigeration units of specialised vehicles that transport perishable goods. These vehicles, known as reefers, are designed to maintain a controlled temperature to preserve goods such as food, chemicals, and medications. Reefer fuel is specifically formulated to work in colder temperatures, ensuring the safe operation of the refrigeration unit.
Reefer trucks typically have two fuel tanks: one for the engine and the other for the refrigeration unit. The size of the reefer fuel tank can vary depending on the truck model and manufacturer. While the capacity of reefer fuel tanks can range from 50 to 100 gallons, some tanks may even max out at around 200 gallons, especially in train cars. Carrier Transicold and Thermo King are known to offer 50-gallon reefer fuel tanks.
The variation in tank size affects the frequency of refuelling. A larger tank means more reefer fuel capacity, resulting in longer intervals between fill-ups. A 50-gallon tank, for instance, typically needs to be refilled every two to four days, as reefers burn around 0.5 to 1 gallon of fuel per hour. Newer models with improved fuel efficiency may extend the duration between refuelling, consuming as little as 0.4 gallons per hour.
The fuel efficiency of a reefer tank also depends on factors such as the ambient temperature, the condition of the trailer, and the maintenance of the refrigeration system. Additionally, the climate, the frequency of opening the trailer, and the size of the load can influence how long the fuel lasts. On average, a full tank of reefer fuel can last between three to five days.
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Frequently asked questions
Reefer fuel is a specialised type of diesel formulated to maintain low temperatures in refrigeration systems. It is dyed red to distinguish it from other fuel types and prevent misuse.
Using regular diesel in a reefer tank could cause the refrigerator to malfunction, leading to engine damage, engine failure, or even the risk of a fire.
The frequency of refills depends on the size of the tank and the rate of fuel consumption. Reefer tanks typically have a capacity of 50-100 gallons and burn around 0.4-1 gallons of fuel per hour, lasting 2-5 days before needing to be refilled.











































