Selecting the appropriate size for a diesel auxiliary tank is a critical decision that can significantly impact your vehicle’s range, efficiency, and overall functionality. Whether you’re a long-haul trucker, off-road enthusiast, or simply looking to extend hotshot vehicle’s fuel capacity, finding the right size tank ensures that you can meet your fueling needs without sacrificing valuable space or payload capacity. In this guide, we’ll explore the factors to consider when choosing the size of a diesel auxiliary tank to suit your specific requirements.


Diesel auxiliary tanks offer a practical solution for extending the range of diesel-powered vehicles, providing additional fuel capacity beyond the standard tank. The size of the auxiliary tank you choose depends on various factors, including your typical driving distance, the frequency of refueling opportunities, and the available space for installation. By carefully evaluating these considerations, you can select a diesel auxiliary tank size that meets your fueling needs without compromising on other aspects of vehicle performance.

Considerations for Choosing the Right Size 

1. Driving Distance and Frequency

Evaluate your typical driving distance between refueling stops and the frequency of refueling opportunities along your route. If you regularly travel long distances without access to fuel stations, you’ll need a larger auxiliary tank to ensure adequate fuel supply between stops. Conversely, if refueling opportunities are plentiful, a smaller auxiliary tank may suffice.

2. Vehicle Fuel Efficiency

Consider your vehicle’s fuel efficiency and consumption rate when determining the size of the auxiliary tank. Vehicles with higher fuel efficiency require less fuel to cover the same distance, allowing you to opt for a smaller auxiliary tank. Conversely, vehicles with lower fuel efficiency may necessitate a larger tank to accommodate longer distances between refueling stops.

3. Available Space for Installation

Assess the available space within your vehicle for installing an auxiliary tank. Measure the dimensions of the mounting area to ensure compatibility with the chosen tank size. Additionally, consider any modifications or adjustments that may be required to accommodate the auxiliary tank without interfering with other vehicle components or cargo space.

4. Payload Capacity

Take into account the impact of the auxiliary tank on your vehicle’s payload capacity, especially if you regularly transport heavy loads or equipment. Choose a tank size that maximizes fuel capacity while still allowing for sufficient payload capacity to meet your operational needs.

5. Legal and Regulatory Considerations

Be aware of any legal or regulatory requirements regarding auxiliary fuel tanks, including size restrictions and safety standards. Ensure that the chosen tank size complies with applicable regulations to avoid potential fines or penalties.


Choosing the right size diesel auxiliary tank requires careful consideration of factors such as driving distance, vehicle fuel efficiency, available space for installation, payload capacity, and legal regulations. By evaluating these considerations thoughtfully, you can select a tank size that meets your fueling needs while ensuring optimal performance and compliance with safety standards. Whether you’re embarking on long-haul journeys, exploring off-grid destinations, or simply seeking added peace of mind on the road, the right size diesel auxiliary tank enhances your vehicle’s capabilities and extends your range with confidence.


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