How Much Do 35s Lower MPG in Ford 7.3?

Fuel efficiency is a significant consideration for many vehicle owners, as it directly impacts both their budget and environmental impact. Among the various factors influencing fuel consumption, tire size plays a crucial role. The association between tire size and MPG (Miles Per Gallon) is a subject of interest for those driving a Ford 7.3, wondering about the impact of installing 35-inch tires. This popular modification can introduce aesthetic appeal and off-road capabilities, but it’s important to consider the potential trade-off in fuel efficiency. By examining the effects of larger tires on MPG, individuals can make informed decisions about balancing performance and economy with their Ford 7.3.

What Is the MPG on a 1997 F350 7.3 L?

The 1997 Ford F-350 with a 7.3L engine is known for it’s robust and powerful performance. However, when it comes to fuel efficiency, this truck may not excel as much. Based on data gathered from 196 vehicles, 4,587 fuel-ups, and 1,213,035 miles of driving, the average MPG for the 1997 F-350 is reported to be around 12.44.

It’s important to note that this figure provides a combined average, taking into account various driving conditions, terrains, and individual driving habits. Due to these factors, there’s also a margin of error of 0.12 MPG associated with this estimation. Therefore, the actual MPG may slightly fluctuate for different instances and individuals.

It’s focus lies in delivering maximum power and torque rather than achieving exceptional fuel efficiency. Hence, it’s natural to expect a lower MPG compared to smaller, more fuel-efficient vehicles.

However, what the 1997 F-350 may lack in fuel economy, it compensates for with it’s rugged durability and towing capabilities. This truck is renowned for it’s reliability and performance in the most demanding tasks, making it a favorite among truck enthusiasts and those needing a workhorse for heavy-duty applications.

Factors Affecting the MPG of a 1997 F-350 7.3L This Topic Could Explore the Various Factors That Can Influence the Fuel Efficiency of the 1997 F-350, Such as Load Weight, Driving Speed, Engine Maintenance, and Aerodynamics.

The MPG (miles per gallon) of a 1997 F-350 7.3L can be influenced by several factors. These include the weight of the load being carried, the speed at which the vehicle is being driven, the maintenance of the engine, and the aerodynamics of the vehicle.

When it comes to gas mileage, the 7.3 Ford doesn’t impress with it’s numbers. Onboard fuel-economy computers often exaggerate their figures, but in this case, it seems like the 7.3 could use a constant supply of fuel connected to a tanker truck. Even while towing, the indicated mpg is a disappointing 8 to 9, hardly improving without a trailer at just 12 mpg.

What Gas Mileage Does a 7.3 Ford Get?

When it comes to gas mileage, the 7.3 Ford is known for it’s voracious appetite for fuel. It’s no secret that larger engines tend to be less economical, and this behemoth of an engine is no exception.

During towing, you can expect the gas mileage to take a significant hit. The onboard fuel-economy computers may try to sugarcoat the numbers, but the truth is that the 7.3 Ford could use a direct connection to a tanker truck. In real-world testing, we observed an indicated 8 to 9 mpg while towing, which is far from impressive.

While it may excel in other areas, fuel efficiency is an aspect where it falls behind. This is something to keep in mind if youre considering purchasing a vehicle powered by this engine.

Can Modifications or Upgrades Be Made to Improve the Gas Mileage of a 7.3 Ford?

  • Checking and replacing air filters regularly.
  • Opting for synthetic motor oil.
  • Keeping tires properly inflated.
  • Using fuel additives or octane boosters.
  • Installing a cold air intake system.
  • Upgrading the exhaust system.
  • Retuning the engine with performance chips.
  • Reducing vehicle weight by removing unnecessary items.
  • Driving at steady speeds and avoiding rapid acceleration.
  • Maintaining regular tune-ups and engine maintenance.

How Many MPG Does a 7.3 Get?

When it comes to the fuel efficiency of a 7.3, it’s essential to consider various factors that can influence it’s MPG. The experience of driving the truck when it’s empty provides a comfortable ride overall. The starting and stopping motions are smooth, ensuring a pleasant driving experience. However, it’s worth mentioning that the ride can be a little rough due to the nature of the vehicle.

In terms of fuel consumption, over a course of 58.8 miles, I used approximately 3.954 gallons of gas. This equates to a calculated fuel efficiency of around 14.87 mpg. Interestingly, the computer in the truck also read 14.9 mpg, which is practically the same as our calculated number when rounded to the nearest decimal point. This congruence between the computers reading and our calculations demonstrates the accuracy of the on-board system.

It’s worth noting that the observed fuel efficiency may vary depending on several factors such as driving conditions, load, and driving style. Factors such as driving on steep terrain, carrying heavy loads, or aggressive driving may cause the fuel efficiency to decrease slightly.

As such, it’s always advisable to drive responsibly and efficiently, keeping these variables in mind. By doing so, not only will you ensure a smoother ride, but you may also enhance the overall fuel efficiency of the 7.3, providing a more economical experience.

Tips for Improving Fuel Efficiency in a 7.3

Improving fuel efficiency in a 7.3 engine can be done through several simple tips. Firstly, maintaining proper tire pressure helps reduce resistance and allows for smoother movement. Secondly, minimizing unnecessary weight by removing excess cargo or equipment can reduce strain on the engine. Additionally, avoiding excessive idling and utilizing cruise control on highways can help optimize fuel consumption. Lastly, regular maintenance such as changing air filters, spark plugs, and fluids can ensure the engine is running efficiently. These simple steps can enhance fuel efficiency in a 7.3 engine without compromising performance.


In conclusion, the addition of 35s onto a Ford 7.3 can have a noticeable impact on mpg. While exact figures may vary depending on various factors such as driving conditions, tire type, and vehicle modifications, it’s generally expected that larger tires will result in a reduction in fuel efficiency. The increased weight, higher rolling resistance, and altered gear ratios can all contribute to a decrease in miles per gallon. However, it’s worth noting that the extent of this decrease may be mitigated by adjustments such as re-gearing or modifying engine components.

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