Fuel Saving & Economy
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Does cruise control save fuel?
CheckFuelPrices Editorial
Expert Written • 4 industry sources
Yes, cruise control saves fuel on flat roads and motorways by eliminating the small speed fluctuations that waste fuel. On hilly or stop-start roads, however, it can actually increase fuel consumption.
Why Cruise Control Improves Fuel Economy
Steady speed = less fuel:
Every time you accelerate even slightly, you burn more fuel. Cruise control holds a constant speed so the engine delivers only what is needed, cutting unnecessary fuel use.
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Eliminates unconscious speed creep:
Most drivers gradually increase speed without noticing, especially on motorways. Cruise control prevents this, keeping you at a more efficient throttle position.
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Up to 15% savings on flat roads:
Maintaining a steady speed at 60–70 mph on a flat carriageway can reduce fuel consumption by around 10–15% compared with uneven manual throttle input.
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When Cruise Control Does Not Save Fuel
Hills are the exception:
On undulating roads, cruise control holds speed by accelerating uphill and braking downhill — the opposite of what an experienced driver would do. This wastes fuel.
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Urban driving is unsuitable:
In stop-start traffic, cruise control cannot be used effectively and offers no benefit. It is designed for consistent motorway or dual-carriageway driving.
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Adaptive cruise control is different:
Modern adaptive cruise control adjusts speed to the car ahead and can be less efficient in heavy traffic, though it still helps on open roads.
Other Driving Habits That Cut Fuel Use
Smooth acceleration and braking:
Anticipating traffic ahead and accelerating gently is one of the most effective ways to reduce fuel consumption, regardless of whether cruise control is available.
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Optimal motorway speed:
Fuel consumption rises sharply above 70 mph. Driving at 60 mph instead of 70 mph can cut fuel use by roughly 10%, compounding the benefit of cruise control.
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Make the Saving Count at the Pump
Better economy means fewer fill-ups:
Combining cruise control with smooth driving can meaningfully extend the miles you get per tank, reducing how often and how much you spend on fuel.
Compare prices before you fill:
Even small price differences add up over thousands of miles. CheckFuelPrices shows live petrol and diesel prices at 4,000+ UK stations so you always fill up at the best price nearby.
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Sources
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