With fuel prices remaining stubbornly high across the UK, finding ways to reduce your consumption is not just good for the environment — it is good for your wallet. The average UK driver spends over £1,400 per year on fuel, and simple changes to your driving habits and maintenance routine can cut that figure by 15–25%.
Here is how to make every litre go further.
Which Driving Habits Waste the Most Fuel?
Your right foot is the single biggest factor in fuel consumption. Even the most efficient car will guzzle fuel if driven aggressively.
Accelerate Gently
Harsh acceleration uses significantly more fuel than smooth, gradual increases in speed. Imagine there is an egg between your foot and the accelerator pedal — press gently and progressively.
Anticipate Traffic Flow
Look well ahead and react early. Lifting off the accelerator when you see a red light in the distance is far more efficient than maintaining speed and braking hard at the last moment. Modern fuel-injected engines use zero fuel when you are decelerating with your foot off the throttle.
Maintain a Steady Speed
Constantly varying your speed wastes fuel. On motorways, use cruise control where possible. Studies show that driving at a steady 60 mph instead of fluctuating between 55 and 70 mph can improve fuel economy by up to 20%.
Slow Down
Aerodynamic drag increases exponentially with speed. Driving at 70 mph uses roughly 9% more fuel than 60 mph, and 80 mph uses about 25% more. On long journeys, slowing down by just 10 mph can save a noticeable amount of fuel.
What Car Maintenance Improves Fuel Economy?
A poorly maintained car is an inefficient car. Here are the maintenance items with the biggest impact on fuel consumption.
Keep Your Tyres Properly Inflated
Under-inflated tyres create more rolling resistance, forcing your engine to work harder. Tyres that are 10 psi below the recommended pressure can increase fuel consumption by 3–4%. Check your pressures at least once a month.
Replace Your Air Filter
A clogged air filter restricts airflow to the engine, reducing efficiency. Replacing a dirty air filter can improve fuel economy by up to 10% on older cars with carburettors and around 2–3% on modern fuel-injected vehicles.
Use the Correct Engine Oil
Using the wrong viscosity oil creates unnecessary friction inside your engine. Always use the grade recommended in your owner’s manual. Synthetic oils generally provide better fuel economy than conventional mineral oils.
Fix Fault Codes Promptly
A malfunctioning oxygen sensor alone can reduce fuel efficiency by up to 40%. When your check engine light comes on, do not ignore it. Use Cars Guru to read the fault code and understand whether it is affecting your fuel consumption.
How Does Extra Weight and Drag Affect Fuel Consumption?
Every extra kilogram your car carries costs fuel. Remove roof boxes, bike racks, and heavy items from your boot when you are not using them.
A roof box can increase fuel consumption by 10–25% at motorway speeds due to the added aerodynamic drag. Roof bars alone add 2–4%, even without anything attached.
How Does Journey Planning Save Fuel?
Short trips are the worst for fuel economy. A cold engine uses significantly more fuel until it reaches operating temperature. Combining several short errands into one round trip is far more efficient than making multiple cold starts throughout the day.
Consider whether you need to drive at all for very short journeys. Walking or cycling for trips under a mile saves fuel and is better for your health.
How Can You Track Your Fuel Spending Effectively?
You cannot improve what you do not measure. Tracking your fuel consumption over time reveals patterns and shows whether your efforts are making a difference.
Cars Guru makes this easy with built-in expense tracking. Log every fill-up, and the app calculates your running costs over time. You can see exactly how much you spend on fuel each month and track improvements as you adopt better habits.
How Can You Start Saving on Fuel Today?
Small changes add up to big savings over the course of a year. Download Cars Guru to track your fuel expenses, maintain your car for peak efficiency, and keep more money in your pocket. With maintenance reminders and cost tracking built in, staying on top of your car’s efficiency has never been simpler.