Reducing Truck Height and Its Potential Impact on MPG

When it comes to trucks, the debate over lowering height and its effect on fuel efficiency is a subject of much more than just car enthusiast discourse. While some believe lifting their truck is simply an exercise in vanity, others wonder if lowering the height can actually improve fuel consumption. Let's explore the physics and practical aspects to see whether a lowered truck does indeed increase miles per gallon (MPG).

Physics Explained

The argument that lowering a truck increases MPG is based on the basic principles of aerodynamics and vehicle weight distribution. A lower truck profile exposes less surface area to the wind, resulting in less drag. Additionally, a lower center of gravity can improve handling and reduce fuel consumption, especially at higher speeds.

Real-World Experience

A driver of a truck who regularly travels on highways shared their experience. Their truck is equipped with a HEMI engine and has a brick-like shape when it comes to aerodynamics. Despite this, the driver managed to achieve better fuel efficiency by driving at a controlled speed. They noted that maintaining a speed of around 115 KPH (71 mph) allowed the Multidisciple Speed System (MDS) to engage, reducing fuel consumption by running on four cylinders rather than six. Cold air intakes, clean oil, and using appropriate octane fuel also contributed to improved fuel economy.

Tips for Better Fuel Efficiency

Besides the height of the truck, several other factors can contribute to better fuel efficiency. Here are some practical tips:

Remove Unnecessary Items: Take out the snow chains, toolbox, fridge, roof tent, and other non-essential items to reduce the truck's weight. Roof racks, ladder racks, and accessories also increase drag and should be removed. Empty the Cargo Bed: Remove any items from the cargo bed, such as the back seats or tailgate, if not in use. A bed cover can further reduce drag. Opt for Lower Profile Tires and Wheels: Smoother tires with less rolling resistance and lighter wheels can significantly reduce friction and improve fuel efficiency.

Hypermiling Techniques

Hypermiling is a driving technique aimed at improving fuel efficiency. Drivers using these techniques often achieve substantial improvements in fuel economy:

Gradual Acceleration: Accelerate smoothly to the speed limit, avoiding sudden and excessive speeds. Avoid aggressive driving and watch for stops, applying the brakes early. Use Eco-Indicators: Most modern cars have eco-indicators that help drivers manage fuel consumption. Watching and responding to these indicators can improve driving habits and fuel efficiency. Drive Predictively: Anticipate traffic patterns and road conditions to keep the vehicle moving smoothly without unnecessary idling or returning to fast speeds.

Conclusion

The idea that lowering a truck can increase MPG is not without merit. While there is a 2-3 MPG improvement from a leveling kit that raises the front end, a more extensive lowering can potentially offer the same benefit. This is because a lower truck reduces air resistance and improves fuel efficiency, especially at higher speeds. As with any vehicle modification, the results may vary based on the truck model and driving conditions. However, the overall goal of reducing air drag and weight distribution remains a sound strategy for achieving better fuel economy.

Remember, better fuel efficiency is not just about lowering the truck; it involves a combination of aerodynamics, weight management, and efficient driving techniques.