The best ways to reduce your car's carbon footprint include driving shorter distances, increasing fuel economy by practising smooth and regular driving habits and regular car maintenance, not turning the engine on unnecessarily for long periods, minimising load, sharing the car or making some journeys by public transport, and selecting a more energy-efficient or electric car when you next buy a car. In general, a petrol-powered car releases approximately 2.35 kilograms of carbon dioxide every litre of fuel it burns, whereas a diesel model spews about 2.68 kg of CO2 per litre. Therefore, saving every litre reduces emissions from the exhaust.
What does a car's carbon footprint include?
The carbon footprint of a car is the sum of the greenhouse gases emitted while the car is being made, used by the owner, maintained, and finally disposed of. When deciding what actions to take in daily life, fuel consumption is the most readily quantifiable aspect because carbon dioxide emitted from the tailpipe increases almost one-to-one with the quantity of petrol or diesel burnt.
| Part of footprint | What it includes | What you can control |
|---|---|---|
| Tailpipe emissions | Carbon dioxide released when petrol or diesel burns in the engine | Fuel used, kilometres driven, driving style, tyre pressure, servicing, idling |
| Energy supply emissions | Emissions from producing, transporting, and selling fuel, or from generating electricity for an EV | Fuel saved, charging source, electricity mix, trip planning |
| Manufacturing emissions | Emissions from producing the car, battery, tyres, parts, and materials | Keeping a serviceable car longer, choosing a durable and efficient replacement |
| Maintenance and end-of-life emissions | Tyres, lubricants, spare parts, repairs, recycling, and scrapping | Preventive maintenance, correct tyre use, responsible disposal |
Which steps can help you reduce your car's emissions?
The major reduction is normally achieved by decreasing fuel usage, through fewer trips driving or less fuel being consumed for a same distance. The list of the feasible initiatives in the following table is sorted according to their immediate effect reducing emissions.
| Action | Carbon impact | Limit or catch |
|---|---|---|
| Drive fewer kilometres | Directly cuts fuel use and tailpipe emissions | Works best for trips you can replace with walking, cycling, public transport, carpooling, or combining errands. |
| Carpool or use public transport for regular commutes | Reduces emissions per person by sharing one vehicle or avoiding a private car trip | The benefit depends on whether the trip is actually avoided, not just shifted to another private car. |
| Drive smoothly | Lower acceleration and braking reduce fuel burned per kilometre | Traffic conditions limit the gain, but sudden acceleration and hard braking are still avoidable in most city driving. |
| Maintain correct tyre pressure | Under-inflated tyres increase rolling resistance and fuel use | Use the pressure on the driver's door frame or owner's manual, not the maximum pressure printed on the tyre. |
| Avoid long idling | Fuel burns while the car moves zero kilometres | Do not switch off in unsafe traffic situations. Focus on parking waits, school pick-ups, and long stationary stops. |
| Use AC carefully | Air-conditioning increases engine load in petrol and diesel cars | In Indian summers, comfort and safety matter. Use shade, ventilation before starting, and moderate temperature settings. |
| Remove unnecessary weight and roof carriers | Extra weight and drag make the engine work harder | The effect is larger for smaller cars and at higher speeds. Remove roof boxes when not in use. |
| Choose a more efficient replacement car | Reduces emissions for every kilometre driven over the new car's use | Replacing too early can add manufacturing emissions. The decision is strongest when your current car is due for replacement. |
| Choose an EV when it fits your use | An electric car has no tailpipe emissions, and life-cycle emissions are generally lower than petrol or diesel cars in many markets according to the IEA. | Charging electricity still has a footprint, and the benefit depends on the electricity source, battery size, and kilometres driven. |
Replacement is not always the lowest-carbon first step
A car in good condition does not have to be sold or scrapped simply because a newer model has just been released to market. A new car emits greenhouse gases just for being produced, so it is only beneficial to get rid of an old car when it has become inefficient, unreliable, expensive to maintain, unsafe, or it reaches its life end anyway.
Does switching to a different car help?
Changing your car is one way to minimize your footprint over time, but the best choice varies based on your kilometres annually, access to charging stations, money, and how long you plan to own the car. If you do not travel many kilometres a year, then behaviour change and maintenance are more important than getting a new car early on.
| Option | Tailpipe emissions while driving | When it can reduce footprint | Main limitation |
|---|---|---|---|
| Keep current petrol or diesel car | Petrol: about 2.35 kg CO2 per litre. Diesel: about 2.68 kg CO2 per litre.1 | Useful when the car is safe, efficient enough, and driven moderately with good maintenance. | Fuel emissions continue for every litre burned. |
| Buy a more fuel-efficient petrol or diesel car | Still emits CO2 at the tailpipe, but uses fewer litres per km | Useful when replacing an old car that has poor mileage or high repair needs. | It still depends on fossil fuel and adds manufacturing emissions. |
| Buy a hybrid | Lower fuel use than a comparable petrol car in many city-use cases | Useful for stop-and-go city driving where regenerative braking and electric assist help. | Still uses petrol and needs regular maintenance. |
| Buy an EV | 0 kg tailpipe CO2 while driving | Useful when you have reliable charging and your driving pattern suits the available range. The IEA states that electric cars generally have lower life-cycle emissions than conventional cars, although the exact benefit depends on the electricity mix.5 | Charging electricity, battery production, purchase cost, charging access, and even car insurance price (which can differ for EVs due to battery value) must be considered." |
Simple fuel-saving habits Indian car owners can start today
Most people from India who own cars would do better in making continuous adjustments to save fuel and not trying to find some miraculous solution. Think about kilometres and litres instead of money and time.
Use walking, biking, public transportation, office transportation or carpooling for the same trips each week.
Maintain proper tyre pressure according to your car manufacturer's recommendations, not the maximum pressure printed on the tyres.
Try not to idle the car at parking lots, near schools, or during long waits.
Think twice before using the air conditioner: vent the hot car first, then turn on the AC, use the shade if possible, and set the temperature to the lowest setting only if necessary.
Remove the roof rack and other heavy objects when you don't need them.
Service the car regularly and fix problems that affect fuel economy, such as clogged filters, poor wheel alignment, or engine warning lights, and consider add ons for car in your car insurance, because when the engine is protected from harm, it will be more efficient after any sort of damage.
Consider fuel efficiency or energy consumption of a new car when you decide to change cars.
Key takeaways
- The carbon emissions from a car using petrol are 2.35 kg of CO2 per litre of fuel consumed, while the carbon emissions from a car using diesel fuel are 2.68 kg of CO2 per litre of fuel consumed.
- Reducing the distance driven is the best way to reduce a car's carbon emissions.
- Fuel economy is increased through better driving since aggressive driving lowers fuel economy by 15% to 30% at high speed and 10% to 40% in stop-and-go traffic.
- Tyres with the correct air pressure increase fuel economy by 3%, while low air pressure decreases it.
- Excessive idling, air conditioning, cargo, and excess weight all contribute to increasing fuel consumption.
- There are no tailpipe emissions from an EV, although the total carbon emissions vary due to other factors.
Frequently asked questions
Use this formula: CO2 produced from petrol = Litres of petrol used x 2.35 kg. CO2 produced from diesel = Litres of diesel used x 2.68 kg. 50 litres of petrol produces around 117.5 kg of CO2.
No. The EV will emit no exhaust while in use, but some carbon dioxide is produced during electricity generation and battery manufacturing. The final outcome will depend on the electricity consumed, car efficiency, battery capacity, and the number of kilometres driven.
Yes. Factors such as varying speeds, rapid acceleration, sudden braking, and heavy AC use all lead to higher fuel consumption. It's worth noting that air conditioning alone in warm weather could significantly reduce fuel efficiency. This effect is especially noticeable on short drives in vehicles that start to get really hot.
Carpooling is an effective way to reduce the number of individual car trips. When two people who were going to drive two cars separately decide to share one car, their individual CO2 emissions decrease significantly. On the other hand, if the carpooling trip is the only one made, then the reduction in air pollution is smaller.
Offsetting is not the first priority. Lower your direct fossil fuel emissions by driving fewer kilometres, maintaining well, and improving replacement efficiency. When you go with offsetting, you have to research the type of project, the verification requirements, the permanence, and whether it would happen anyway.
If servicing is done properly, it can actually reduce emissions by fixing issues that lead to higher fuel consumption, improperly used tyres, blocked filters, the wrong oil, the wrong wheels, or engine malfunctions. A regular service that works best when km/l is tracked every time after refuelling.
About the authors
Nikhila PS
Written by · Senior Content EditorNikhila is a content creator with 6+ years in EdTech and motor insurance, turning complex policies into clear, engaging content. She enjoys exploring digital trends, social media, and art while planning her next short escape.
Rekhit Singh Kaushal
Reviewed by · Senior Director - Motor UnderwritingRekhit Singh Kaushal is Senior Director at ACKO, a leading digital motor insurance provider in India. With deep expertise in insurance strategy and innovation, he brings trusted insights on car and bike insurance to help drivers stay protected.
