With rising fuel prices, many drivers are eager to improve their vehicle’s fuel economy. This article is the first in a
three-part series that explores vehicle modifications that can significantly impact efficiency. Let’s dive into some
common changes that may lead to increased fuel consumption.
- Bigger Wheels and Tyres
One of the most popular modifications is upgrading to larger wheels and tyres. Whether opting for mud-terrain or
all-terrain tyres, this change adds weight to the vehicle’s rotating assembly. As a result, the engine requires more
energy to rotate these heavier tyres (and sometimes heavier aftermarket rims), leading to higher fuel consumption.
For instance, we recently added a set of 33-inch all-terrain tyres to our V6 Ranger, and we’ve noticed an increase of
about 2.5 litres per 100 kilometres in fuel usage. While these aren’t massive 35-inch tyres, the impact on fuel
economy is still significant. - Increased Drag
Another factor affecting fuel economy is drag. Adding items to your vehicle that disrupt airflow or aerodynamics can
have a detrimental effect. Common culprits include rooftop tents, boats, roof racks, and platforms. These
accessories can create extra drag, making it harder for your vehicle to cut through the air while driving, ultimately
leading to increased fuel consumption. - Additional Weight
Weight plays a crucial role in fuel efficiency. It’s not just about the wheels and tyres; additional components like
bullbars, winches, extra lighting, plus those mentioned above, can also add substantial weight. The more weight your
vehicle carries, the more energy it requires to move, resulting in higher fuel consumption. - Suspension Lift Kits
While lift kits can enhance off-road capability, they can also raise a vehicle’s centre of gravity. Vehicles that are
closer to the ground tend to be more fuel-efficient. If you choose to install a lift kit, be aware that it can contribute
to increased fuel consumption, especially when combined with other modifications. - Towing
Towing is a significant factor that greatly influences fuel economy. The heavier the load you tow, the more fuel your
vehicle will consume. For example, towing a 3.5-tonne caravan can sometimes result in fuel consumption that is
more than double that of driving without a load. This added weight dramatically impacts how efficiently your vehicle
operates.
Conclusion
When modifying your vehicle, it’s essential to keep in mind that many changes can lead to increased fuel
consumption. In our next article, we’ll discuss the importance of regular vehicle maintenance and how it can help
improve fuel economy. Stay tuned for more tips on maximizing your vehicle’s efficiency!
