
Tractor-trailers — often referred to simply as “tractors” — are the backbone of the transportation industry. Tractors that have refrigeration units rely on two fuel types: tractor fuel and reefer fuel. While both are diesel, their purposes and regulations differ significantly. Understanding these differences is crucial for efficient operation and staying compliant with the law.
What Is Tractor Fuel?
Tractor fuel is the primary fuel source for a tractor-trailer’s engine. The standard fuel type is ultra-low sulfur diesel (ULSD). ULSD is specifically formulated to minimize the output of sulfur emissions, which are harmful to the environment. This standardization helps maintain air quality and aligns with global efforts to reduce the environmental impact of diesel engines.
Tractor Fuel Taxation
Since tractor diesel fuel is used in vehicles that travel on public highways, it is subject to road taxes. These taxes contribute to the maintenance and development of road infrastructure, promoting the safety and efficiency of transportation routes for all users.
What Is Reefer Fuel?
Reefer fuel powers the refrigeration units on tractors, known as reefers, which are essential for transporting sensitive cargo such as food, pharmaceuticals and other perishables. Unlike tractor fuel, reefer fuel does not run the truck but rather ensures that the cargo remains at the required temperature throughout transportation.
Reefer fuel is often times dyed red to signal its exemption from road taxes and prevent its illegal use in on-road vehicles. This fuel is often formulated to prevent gelling in cold conditions so it can endure the constant cooling and heating cycles within a refrigeration unit.
Reefer Fuel Taxation
Reefer fuel is not subject to road taxes because it is used exclusively for powering refrigeration units, not the tractor’s main engine. This exemption helps reduce the operational costs associated with running refrigerated tractor-trailers.
How Does Reefer Fuel Enable Refrigeration?
Reefer trucking fuel is filled into a dedicated tank, separate from the truck’s main fuel tank. Operators typically refill the main diesel tank first, then switch to filling the reefer tank with the appropriate fuel.
When the refrigeration unit is turned on, the cooling process begins with the combustion of the reefer fuel in a small engine that drives a compressor. The compressor pressurizes and condenses the refrigerant gas in the condenser coils, forcing it to release heat to the outside air as it cools and liquefies.
The cooled liquid refrigerant is forced into an expansion valve, turning it back into a gas and absorbing heat from the trailer’s interior, effectively lowering the temperature inside. A fan circulates air over the evaporator coils filled with the cold gas, evenly cooling the cargo space. This cycle keeps on repeating to maintain a consistent temperature within the reefer.
How to Get Reefer Fuel
Reefer fuel is available at most truck stop diesel fuel pumps, specifically at pumps marked for tractor-trailer use. For larger quantities, businesses can arrange for bulk delivery from commercial fuel suppliers. Scheduling fuel delivery ensures a steady supply and helps you maintain compliance with tax regulations specific to off-road fuel use.
Reefer Fuel Cost
Reefer fuel generally costs less than tractor fuel due to its tax-exempt status. However, the actual savings can vary based on local fuel prices and tax rates. Operators must manage two types of fuel expenses — one for the tractor and another for the reefer unit. Efficient fuel management is crucial to maximizing profitability in transportation operations, especially when transporting goods over long distances.
How Long Does Reefer Fuel Last?
The consumption rate of reefer fuel depends largely on the size, operation and maintenance of the refrigeration unit. Typically, a regular reefer unit will use about one gallon of fuel per hour, but this can vary based on the ambient temperature and the condition of the reefer. Properly maintained units are more fuel-efficient and can offer significant fuel savings over time.
How Can Hot Shot’s Secret Help You?
Hot Shot’s Secret offers a range of diesel additives and solutions that can enhance the performance and reliability of tractor and reefer fuel systems. Our products improve fuel efficiency, reduce engine wear and tear and help maintain your fleet’s performance over time. Our featured formulas for diesel include Everyday Diesel Treatment (EDT), EDT+ Winter Defense, Diesel Extreme, LX4 Lubricity Extreme and more.
Whether you’re looking to boost the efficiency of a long-haul tractor or ensure the reliability of your refrigeration units, Hot Shot’s Secret can help reduce operational costs and improve vehicle longevity.
Our products are backed by science and our money-back guarantee. Shop Hot Shot’s Secret fuel products today, and enjoy free shipping for most orders over $49 in the United States.