Does Stop/Start Technology in Cars Actually Save Fuel?

Does Stop:Start Technology in Cars Actually Save Fuel?

Does Stop/Start Technology in Cars Actually Save Fuel?

To shed light on the question “Does stop/start technology in cars actually save fuel?”, we’ve gathered insights from six industry professionals, including managing directors and a business specialist. From noting complexities in differing vehicle types to looking at fuel savings over time, this article provides a comprehensive look at the impact of stop/start technology on fuel efficiency.

  • Note Complexities in Differing Vehicle Types
  • Understand the Engine Mechanics
  • Reduce Fuel Waste and CO2 Emissions
  • Study Conditions Affecting Fuel Savings
  • Consider Traffic Conditions 
  • Look at Fuel Savings Over Time


Note Complexities in Differing Vehicle Types

From the perspective of an electric car owner, stop-start technology doesn’t directly save fuel since electric vehicles (EVs) use electricity rather than gasoline or diesel. However, it’s worth noting that some plug-in hybrid electric vehicles (PHEVs) also incorporate stop-start technology for their internal combustion engine component. 

In such cases, stop-start can help save fuel when running on gasoline, but it won’t affect the electric driving range or efficiency of the electric portion of the vehicle. For purely electric cars, the concept of saving fuel doesn’t apply, but stop-start technology can still enhance overall energy efficiency and contribute to a more sustainable and eco-friendly driving experience by reducing emissions during brief stops in traffic or at traffic lights.

Gavin Johnson, Managing Director, EV Cable Shop


Understand the Engine Mechanics

As a business owner in the auto industry for over 30 years, this question often arises. Yes, the stop-start technology can help save on fuel, especially in heavy traffic.

The amount saved depends on how often the engine turns off. Research indicates that the stop-start technology boosts fuel economy by 5 to 7%. It operates by turning off the engine when braking and restarting it when the brake is released. This prevents the engine from idling, which wastes gas and decreases fuel efficiency.

Less idling equates to better fuel efficiency. However, the amount saved depends on driving style. Calm driving leads to more fuel savings. It’s a simple way to be more fuel-efficient without much hassle for drivers.

Steve May, Owner, Number Plates 4 You


Reduce Fuel Wastage and CO2 Emissions

Yes, stop-start technology in cars does save fuel. It automatically turns off the engine when the car is stopped, like at traffic lights, and restarts it when needed. This reduces fuel wastage from idling engines, increasing overall efficiency and lowering emissions. Studies have shown it can save around 6% in fuel costs and reduce CO2 emissions by almost 3 tons per vehicle over two years, making it both financially and environmentally beneficial.

James McNally, Managing Director, SDVH [Self Drive Vehicle Hire]


Study Conditions Affecting Fuel Savings

Stop-start technology, designed to reduce fuel consumption by automatically turning off the engine when a vehicle is stationary and restarting it when the driver accelerates, can indeed save fuel under certain conditions.In stop-and-go traffic or during prolonged idling, this technology can lead to noticeable fuel savings. However, its effectiveness depends on factors like traffic patterns, driving habits, and the vehicle’s design. 

To maximize fuel savings, it’s important for drivers to understand how and when this technology operates and adapt their driving accordingly. While it’s a promising innovation for fuel efficiency, its impact varies based on individual driving scenarios.

Fahd Khan, Director of Marketing and Technology, JetLevel Aviation


Consider Traffic Conditions 

Stop-start technology in cars does save fuel, especially in heavy traffic when vehicles often come to a complete stop. However, in super-short stops, like when you pause at a red light for just a few seconds, the fuel savings might not be as noticeable. This happens because restarting the engine uses energy, and if the stop is ultra-short, you might not save much fuel compared to what’s needed to start the engine again. 

While it’s a great fuel-saving feature overall, it’s most effective when your stops are longer and more frequent, like in city driving or heavy traffic.

Mike Hagley, Digital PR Lead, Carbar


Look at Fuel Savings Over Time

Yes, stop-start technology in cars does save fuel. It works by turning off the engine when the car is stationary, like at a red light, and restarting it when you start moving again. Studies have shown that this can reduce fuel consumption by about 10-15%. While it may not seem like a lot, it adds up over time and can save you money, especially with increasing gas prices.

David Bui, Director and Business Specialist, Schmicko


Related Questions


To Top

Pin It on Pinterest

Share This