
There are several factors to consider when deciding whether to opt for a bigger fuel tank or not. A larger fuel tank means fewer refills, which can be convenient and save money in the long run, especially when fuel prices vary across locations. However, bigger tanks also mean more weight, which can impact fuel efficiency and performance, and the initial cost of upgrading can be significant. For those who frequently drive long distances or in remote areas, the benefits of a larger tank may outweigh the drawbacks, but for occasional use, the cost-benefit may not be as clear.
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What You'll Learn

Cost of a bigger fuel tank
The cost of a bigger fuel tank varies depending on the vehicle and the desired tank size. Fuel tanks typically cost between $700 and $2,500 to replace, with an average cost of around $1,500. For example, a new OEM fuel tank for a Honda Civic can cost between $400 and $600, while an equivalent part for a BMW 7 Series can cost nearly $1,600.
Some people choose to install aftermarket replacement fuel tanks to increase their vehicle's fuel capacity. For instance, one individual replaced their stock 36-gallon tank with a 56-gallon Transfer Flow tank, which cost them approximately $1,200, including installation and a tank of fuel. Another individual opted for a Titan 67-gallon fuel tank, allowing them to travel from Phoenix to Southern California without refuelling.
In some cases, individuals may choose to carry additional fuel cans or jerrycans instead of investing in a larger fuel tank. This option can be more cost-effective, especially for those who don't frequently drive long distances. For example, one individual chose to spend $100 on 5-gallon jerrycans instead of spending over $2,000 on a larger fuel tank for their truck.
It's important to note that the weight of a larger fuel tank and the additional fuel can impact fuel efficiency and vehicle performance. Additionally, the cost of a fuel tank replacement may be covered under warranty, depending on the circumstances of the failure and the terms of the warranty.
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Convenience and peace of mind
A larger fuel tank means fewer fill-ups, which can be a huge convenience if you're embarking on a long journey, especially in remote areas with fewer gas stations. This also means saving time and money on fuel costs, as you can shop around for better fuel prices. This can be a significant advantage for those who frequently drive long distances or in remote areas, eliminating the worry of running out of gas and providing peace of mind.
However, it's important to consider the weight of a larger tank and the potential impact on fuel efficiency. While some claim that the weight difference is negligible and doesn't significantly affect performance, others argue that the added weight can decrease fuel efficiency and impact towing capacity. This is particularly important if your vehicle is already close to its GVWR (Gross Vehicle Weight Rating). Additionally, the cost of upgrading to a larger fuel tank can be significant, and you may need to consider factors such as space, ground clearance, and crash testing compatibility.
For some, the convenience of a bigger fuel tank is a worthwhile investment, while others may find the cost and potential performance impact outweigh the benefits. Ultimately, the decision comes down to individual needs and preferences, as well as the specific vehicle and its usage.
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Weight and fuel efficiency
Weight is a key consideration when it comes to fuel efficiency. The weight of gasoline is 5.8 to 6.5 lbs per gallon. While the weight difference between a full and half-full tank may not seem significant, it can impact fuel efficiency, especially when combined with other factors such as suspension and terrain.
For example, consider a vehicle with a 10-gallon tank that is half full, carrying 29 to 32 lbs of fuel, compared to a 15-gallon tank that is also half full, carrying 44 to 49 lbs. The difference in weight between the two tanks is approximately 13 to 17 lbs. While this weight difference may not significantly affect fuel efficiency in isolation, it can have an impact when combined with other factors. For instance, every additional 150 lbs of weight has been observed to result in a loss of 1 mpg. Therefore, while the weight of the fuel itself may not be a major concern, the overall weight of the vehicle, including cargo and passengers, can influence fuel efficiency.
Additionally, the weight of the fuel tank itself can be a factor. Installing a larger fuel tank may require additional modifications, such as changing the suspension or reinforcing the structure to accommodate the increased weight. These modifications can further impact the vehicle's fuel efficiency and handling.
In some cases, the added weight of a larger fuel tank and the fuel it carries may push the vehicle's total weight beyond its Gross Vehicle Weight Rating (GVWR). This can have legal implications and impact insurance and safety. Therefore, it is crucial to carefully consider the weight implications of installing a larger fuel tank and ensure that it complies with relevant regulations and safety standards.
Furthermore, the terrain and driving conditions can also influence the impact of weight on fuel efficiency. For instance, off-roading or driving on uneven surfaces may require more fuel due to increased demand on the engine and reduced fuel efficiency. In such cases, a larger fuel tank can provide added range and peace of mind, ensuring that the vehicle has sufficient fuel to reach its destination or a refueling point.
In summary, while the weight of the fuel tank and fuel can impact fuel efficiency, the overall weight of the vehicle, including cargo and passengers, is also a significant factor. The benefits of a larger fuel tank, such as increased range and reduced refueling stops, should be weighed against the potential impact on fuel efficiency and vehicle performance. Additionally, it is essential to ensure that any modifications comply with safety regulations and do not compromise the structural integrity or handling of the vehicle.
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Safety and breakdown prevention
A larger fuel tank can provide peace of mind and help prevent unexpected breakdowns due to empty fuel tanks. Running out of fuel can leave you stranded, and a bigger tank ensures you always have enough fuel to reach your destination. This is especially beneficial when driving in remote areas with few gas stations or when undertaking long-distance trips.
The weight of a larger fuel tank and the additional fuel can impact the overall weight of your vehicle. This, in turn, may affect performance, fuel efficiency, and mileage. It is important to consider whether the added weight could exceed weight limits or impact the handling and suspension of your vehicle.
Some users have expressed concerns about the safety implications of larger fuel tanks, particularly in the event of a fuel spill. It is crucial to prioritize safety and ensure that any modifications are compatible with your vehicle and adhere to relevant regulations.
The cost of a bigger fuel tank is another factor to consider. While a larger tank can save money on fuel in the long run, especially when purchasing fuel off interstate, the initial investment can be significant.
Additionally, some users have shared their experiences with alternative solutions, such as carrying extra fuel or using jerrycans. These options provide flexibility and can be useful in emergencies, such as puncturing your main fuel tank.
In summary, a bigger fuel tank can enhance safety and breakdown prevention by reducing the risk of running out of fuel. However, it is essential to carefully evaluate the potential impact on vehicle performance, weight limits, and safety regulations, as well as consider the associated costs and alternative solutions.
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Resale value
When it comes to the resale value of vehicles, several factors come into play. One crucial aspect is the prevailing market trends, which are currently witnessing a significant shift towards sustainability and environmentally conscious choices. As a result, the type of fuel and fuel efficiency of a vehicle can significantly impact its resale value.
Electric vehicles (EVs) and hybrids are gaining popularity due to their lower carbon footprint and reduced greenhouse gas emissions. This shift in consumer preferences towards more efficient and sustainable vehicles has led to a potential increase in the resale value of EVs and hybrids. At the same time, vehicles that heavily rely on fossil fuels, such as traditional petrol and diesel engines, may experience a dip in their resale value due to their higher emissions.
However, it is important to note that diesel vehicles still hold value in the resale market. Their reputation for durability and capability in handling larger vehicles, such as trucks and SUVs, ensures their practicality for certain buyers. Additionally, diesel engines have been a popular choice for larger vehicles due to their superior fuel efficiency.
While the fuel type and environmental considerations are essential, other factors also influence the resale value. The cost of ownership, including maintenance costs and fuel expenses, plays a crucial role. Vehicles that are cheaper to run and maintain tend to have better resale value. Pre-owned vehicles that are well-maintained and have lower ownership costs attract buyers seeking efficiency.
In this context, the size of the fuel tank can indirectly impact the resale value. A larger fuel tank can provide benefits such as reduced maintenance costs and improved fuel efficiency. By allowing fewer refuelling stops, a bigger fuel tank can decrease wear and tear on the engine, resulting in potential cost savings. This, in turn, can positively influence the overall resale value of the vehicle by reducing the running costs and enhancing the vehicle's efficiency.
In summary, while the size of the fuel tank may not be the primary factor in determining resale value, it can contribute to enhancing the vehicle's overall efficiency and reducing ownership costs. This, combined with the prevailing market trends and consumer preferences for sustainability, can positively or negatively influence the resale value of a vehicle.
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Frequently asked questions
Not necessarily. While a bigger fuel tank can be beneficial in certain situations, such as when driving long distances or in remote areas, there are also some drawbacks to consider.
A larger fuel tank means you'll need to fill up less frequently, which can save you time and money, especially if you're driving in an area with few gas stations. It can also provide peace of mind and help prevent unexpected breakdowns due to empty fuel tanks.
Yes, a bigger fuel tank can add weight to your vehicle, which may impact fuel efficiency and performance. Additionally, upgrading to a larger fuel tank can be expensive, and there may be compatibility and space considerations to take into account.
The cost can vary depending on the vehicle and the size of the new fuel tank. Some people have reported spending around $1,200 for a larger fuel tank, while others have spent up to $2,395 for an additional 26 gallons.
Yes, instead of upgrading to a bigger fuel tank, you could consider carrying extra fuel cans or jerrycans. This can be a more cost-effective solution, especially if you don't frequently drive long distances or need the additional range.











































