• Jan 05, 2026
• Drive360

The Maruti Suzuki Swift Dzire has been a long-time favorite for Indian car buyers, especially those who seek a compact sedan that offers comfort, reliability, and excellent fuel economy. Now, with the addition of a CNG variant, the Swift Dzire has become an even more attractive option for people looking to save on running costs without sacrificing everyday usability.

In this guide, we will explore Swift Dzire CNG mileage, its real-world performance, factors affecting fuel economy, comparisons, maintenance tips, and answer some common questions. Whether you’re considering buying one or just curious, this comprehensive article has got you covered.

Introduction to Swift Dzire CNG Variant

Maruti Suzuki has always been ahead when it comes to offering CNG options across its lineup. The Swift Dzire CNG, officially known as the Dzire S-CNG, is part of their eco-friendly initiative and caters to customers looking for a greener, more economical vehicle.

The CNG variant is based on the petrol model but features factory-fitted CNG equipment, ensuring better safety, warranty coverage, and seamless integration compared to aftermarket kits. It uses the same 1.2-liter K-Series engine, tuned to perform efficiently with compressed natural gas.

The main highlight? Outstanding mileage and lower cost per kilometer compared to its petrol sibling.

What is the Claimed Mileage of Swift Dzire CNG?

As per Maruti Suzuki, the Swift Dzire CNG offers an ARAI-certified mileage of around 31.12 km/kg.
This number positions the Dzire CNG among the most fuel-efficient sedans in the country. However, real-world mileage can vary based on a variety of conditions such as driving habits, traffic, terrain, and vehicle maintenance.

Typically, in city conditions, you can expect around 25–28 km/kg, while on highways, it can stretch closer to the claimed figure, around 30–31 km/kg, provided you drive with a light foot.

Real-World Swift Dzire CNG Mileage: What Users Say

Many users and automotive reviewers have shared their experiences with the Swift Dzire CNG variant. Here’s a summarized view:

• City Mileage: Between 24–28 km/kg, depending on traffic congestion and driving style.
• Highway Mileage: Between 29–32 km/kg with consistent speeds.
• Mixed Conditions: Around 26–29 km/kg for daily commuting that involves both city and occasional highway stretches.

It’s important to note that newer vehicles often deliver slightly lesser mileage during the initial few thousand kilometers due to engine bedding-in processes. After the first few services, the engine usually settles into delivering optimum efficiency.

Factors Affecting Swift Dzire CNG Mileage

Several factors can influence the mileage you get from your Swift Dzire CNG:

1. Driving Style

Aggressive acceleration, harsh braking, and sudden lane changes consume more fuel. Smooth, gradual movements save gas.

2. Traffic Conditions

Stop-and-go traffic, especially in metros like Mumbai, Delhi, and Bangalore, affects mileage negatively. Highway cruising usually results in better figures.

3. Tyre Pressure

Under-inflated tyres increase rolling resistance and hurt fuel economy. Maintaining the correct tyre pressure ensures optimal mileage.

4. Vehicle Load

Carrying heavy loads or multiple passengers regularly can lower fuel efficiency.

5. Maintenance and Service

Regular maintenance like timely air filter cleaning, spark plug replacements, and CNG kit servicing keeps the vehicle running efficiently.

6. Quality of CNG

Poor-quality gas from unreliable pumps can affect mileage and engine performance.

7. Use of Air Conditioning

Using the AC extensively, especially in city traffic, will reduce fuel economy.

How Does Swift Dzire CNG Compare to Petrol and Diesel Variants?

Here’s a general comparison based on user feedback and official data:

• Swift Dzire Petrol Mileage: Around 22–24 km/l (ARAI), real-world approx. 16–19 km/l.
• Swift Dzire Diesel Mileage (when it was available): Around 28–29 km/l (ARAI), real-world approx. 20–24 km/l.
• Swift Dzire CNG Mileage: 31.12 km/kg (ARAI), real-world approx. 26–30 km/kg.

Clearly, the CNG variant offers the lowest running cost per kilometer, especially for daily commuters covering long distances.

Advantages of Swift Dzire CNG

Choosing the Dzire CNG comes with a bunch of practical advantages:

• Lower Running Cost: CNG is significantly cheaper than petrol and diesel.
• Environment-Friendly: CNG produces fewer emissions, making it greener.
• Factory-Fitted Kit: Safer and warranty-backed compared to aftermarket kits.
• Decent Power: Although CNG slightly reduces power compared to petrol, the Dzire still offers enough performance for city and highway use.
• Smooth Transition: The CNG-petrol switch happens seamlessly while driving.

Any Disadvantages?

Of course, no vehicle is perfect. Some compromises include:

• Reduced Boot Space: The CNG cylinder eats into the boot, leaving less room for luggage.
• Slight Power Drop: CNG mode reduces engine performance by around 15% compared to petrol.
• Initial Higher Cost: The CNG variant costs more upfront than its petrol counterpart.
• CNG Availability: Refueling can be an issue in areas with limited CNG infrastructure.

Tips to Maximize Swift Dzire CNG Mileage

If you want to get the best possible mileage from your Dzire CNG, here are some practical tips:

1. Drive Smoothly: Avoid sudden acceleration and braking.
2. Maintain Proper Tyre Pressure: Check tyres weekly.
3. Service Regularly: Stick to service schedules and ensure the CNG kit is inspected routinely.
4. Use Good Quality CNG: Refuel from reputed pumps only.
5. Lighten the Load: Remove unnecessary items from the car.
6. Use AC Wisely: Use air conditioning judiciously in heavy traffic.

By following these simple habits, many owners have reported achieving 30+ km/kg consistently.

Is Swift Dzire CNG Good for Long-Term Ownership?

Absolutely. The Dzire CNG is one of the best long-term bets if you drive a lot every month. It offers:

• High reliability (Maruti’s strong aftersales network)
• Low maintenance cost
• High resale value
• Great fuel economy

Just ensure proper maintenance, and the car can easily run beyond 1 lakh kilometers without major issues.

FAQs About Swift Dzire CNG Mileage

Q1. What is the official mileage of Swift Dzire CNG?
A1. The ARAI-certified mileage of the Swift Dzire CNG is 31.12 km/kg.

Q2. How much mileage can I expect in city driving?
A2. In typical city conditions, you can expect around 24–28 km/kg, depending on traffic and driving style.

Q3. Does Swift Dzire CNG have enough power for highway driving?
A3. Yes, despite a slight power drop compared to petrol mode, the Dzire CNG handles highway cruising comfortably at speeds of 80–100 km/h.

Q4. Does CNG installation affect the warranty?
A4. No, because the Swift Dzire CNG comes with a factory-fitted CNG kit, the warranty remains intact.

Q5. How often should I service the CNG kit?
A5. It's recommended to get the CNG kit inspected every 10,000 km or at every regular service.

Q6. Is there any difference in mileage between manual and automatic Dzire CNG?
A6. Currently, the Swift Dzire CNG is available only with a manual transmission, so no comparison with an automatic variant exists.

Q7. How does running cost compare between Dzire petrol and Dzire CNG?
A7. On average, the running cost of CNG is about 40–50% cheaper than petrol, making Dzire CNG much more economical for daily use.

Q8. Can I switch from CNG to petrol while driving?
A8. Yes, the vehicle allows seamless switching between CNG and petrol even while on the move.

Q9. What is the tank capacity of Swift Dzire CNG?
A9. The CNG tank capacity is around 55 liters (water equivalent), which provides a practical driving range of approximately 250–300 km per full tank.

Q10. Is Swift Dzire CNG suitable for Uber or Ola drivers?
A10. Definitely. Thanks to its fantastic mileage and low operating costs, the Dzire CNG is a popular choice among taxi fleet operators.

Conclusion: Is the Swift Dzire CNG Worth It?

If you are someone who drives a lot every day — either commuting to work, running a business, or operating a cab service — the Swift Dzire CNG makes a lot of sense. Its excellent mileage of over 30 km/kg, low running cost, reliability, and Maruti’s vast service network make it a very strong value proposition.

Sure, you have to compromise a bit on boot space and power, but for most practical users, the savings and benefits easily outweigh these minor drawbacks. Over a period of 5–7 years, the amount you save on fuel alone can add up significantly.