The Maruti Suzuki Ertiga is one of India’s most popular seven-seater family cars. Its practical cabin, affordable pricing and efficient petrol and CNG engines make it suitable for private buyers and commercial operators.
Mileage varies significantly between the petrol manual, petrol automatic and CNG versions. The automatic prioritises convenience, while the CNG version offers the lowest fuel cost. This guide compares their claimed efficiency, real-world results, running expenses and suitability for different driving requirements.
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Maruti Suzuki Ertiga Engine and Transmission Options
The Ertiga is powered by a 1.5-litre K15C four-cylinder petrol engine. The engine uses dual injectors, dual variable valve timing and idle start-stop technology.
In petrol form, the engine produces approximately 103 PS and 136.8 Nm. Buyers can choose between a five-speed manual and a six-speed torque-converter automatic transmission. The automatic also provides paddle shifters.
The Ertiga CNG uses the same 1.5-litre engine with a factory-fitted S-CNG system. Output falls to approximately 88 PS and 121.5 Nm when the car runs on CNG. The CNG version is available only with the five-speed manual gearbox.
| Powertrain | Transmission | Maximum Output | Maximum Torque |
| 1.5-litre petrol | 5-speed manual | Around 103 PS | 136.8 Nm |
| 1.5-litre petrol | 6-speed automatic | Around 103 PS | 136.8 Nm |
| 1.5-litre CNG | 5-speed manual | Around 88 PS | 121.5 Nm |
The Ertiga has a 45-litre petrol tank. It provides seating for seven occupants and has 209 litres of boot space with all three rows in use. Boot capacity expands to approximately 803 litres when the third row is folded.
Maruti Suzuki Ertiga Claimed Mileage
The petrol manual has a certified mileage of 20.51 kmpl. The automatic is rated at 20.30 kmpl.
The Ertiga S-CNG delivers a claimed 26.11 km/kg. The CNG version therefore has the highest certified efficiency in the range.
| Fuel Type | Transmission | Claimed Mileage |
| Petrol | 5-speed manual | 20.51 kmpl |
| Petrol | 6-speed automatic | 20.30 kmpl |
| CNG | 5-speed manual | 26.11 km/kg |
The difference between the petrol manual and automatic appears small under laboratory testing. Their real-world mileage can differ more noticeably, particularly in congested traffic.
Claimed figures are recorded under controlled testing conditions. Actual mileage depends on traffic, speed, road conditions, vehicle load, tyre pressure and driving behaviour.
Maruti Suzuki Ertiga Claimed vs Real-World Mileage
Owner-reported data published by Autocar India lists an average of approximately 18.77 kmpl for the petrol manual, 17.97 kmpl for the automatic and 23.18 km/kg for the CNG model. These are reported averages rather than guaranteed results.
CarWale tested the Ertiga CNG at 18.01 km/kg in city conditions and 35.6 km/kg on the highway. Its combined tested figure was 22.41 km/kg.
| Version | Claimed Mileage | Reported or Tested Mileage |
| Petrol manual | 20.51 kmpl | Around 18.77 kmpl owner-reported average |
| Petrol automatic | 20.30 kmpl | Around 17.97 kmpl owner-reported average |
| CNG manual | 26.11 km/kg | 22.41 km/kg combined tested mileage |
The unusually high highway result in the CNG test should not be treated as a normal expectation for every driver. It was achieved under a specific route, speed and testing procedure.
A fully loaded Maruti Suzuki Ertiga travelling through city traffic may return considerably lower efficiency. A lightly loaded car driven at a steady highway speed can perform better.
Maruti Suzuki Ertiga City Mileage Comparison
Petrol Manual City Mileage
The petrol manual offers a good balance between efficiency, control and purchase price.
Drivers can improve mileage by shifting early and maintaining a gentle throttle. However, frequent clutch use and repeated acceleration in heavy traffic can reduce efficiency.
The manual is best suited to drivers who are comfortable changing gears and want better control over fuel consumption. It may also be more economical than the automatic when driven carefully.
Petrol Automatic City Mileage
The six-speed automatic is the easiest Ertiga to drive in congested traffic.
Its torque-converter gearbox provides smoother operation than an automated manual transmission. However, frequent creeping, idling and acceleration can increase fuel consumption.
A useful real-world reference comes from the Toyota Rumion automatic. The Rumion shares its basic engine and drivetrain with the Ertiga. It returned 14 kmpl in the city and 19 kmpl on the highway during a CarWale test. This result can be viewed as a reasonable powertrain reference, although conditions and vehicle setup may differ.
The Ertiga automatic is therefore suitable for buyers who value convenience more than the lowest possible fuel expense.
CNG City Mileage
The Ertiga CNG offers the lowest running cost for regular city travel.
CarWale recorded 18.01 km/kg during its city test. Stop-and-go traffic, air-conditioning and a full passenger load can reduce this figure further.
The CNG engine also produces less power than the petrol version. Drivers may need to press the accelerator harder when the car is fully loaded or travelling uphill.
Its main advantages are lower fuel cost and factory-backed integration. The disadvantages include reduced luggage space, longer refuelling times and limited CNG availability in some areas.
What Affects Ertiga Mileage in City Driving?
- Traffic Conditions
Repeated braking and acceleration consume more fuel than maintaining a steady speed. Severe congestion also results in extended idling.
- Passenger and Luggage Load
The Ertiga is often used with six or seven occupants. The additional weight makes the engine work harder, especially from a standstill.
- Air-Conditioning Use
The Ertiga may require continuous air-conditioning for all three rows. This additional load can affect mileage, particularly during slow city journeys.
- Driving Style
Sudden acceleration reduces efficiency. Smooth throttle inputs help the automatic gearbox shift earlier and allow manual drivers to maintain lower engine speeds.
- Journey Length
Very short trips usually provide lower mileage because the engine does not have enough time to reach an efficient operating temperature.
- Tyre Pressure
Underinflated tyres increase rolling resistance. Tyre pressure should be checked regularly and adjusted according to the manufacturer’s recommendation.
Maruti Suzuki Ertiga Highway Mileage Comparison
The Ertiga generally becomes more efficient during steady highway driving.
Petrol Manual Highway Mileage
The manual can provide strong highway efficiency when driven at a consistent speed.
Its fifth gear is suitable for relaxed cruising. Frequent high-speed overtaking or carrying seven occupants with luggage will increase fuel consumption.
Drivers who maintain moderate speeds may achieve mileage closer to the claimed figure than they would in city traffic.
Petrol Automatic Highway Mileage
The six-speed automatic performs better on highways than in congested urban conditions.
The additional gear allows the engine to maintain lower revolutions while cruising. The paddle shifters can also help during overtaking or downhill driving.
The closely related Toyota Rumion automatic recorded 19 kmpl during a CarWale highway test. This shows the potential of the shared engine and six-speed automatic under favourable conditions.
CNG Highway Mileage
The Ertiga CNG delivered 35.6 km/kg in CarWale’s highway test. Its combined figure was a more representative 22.41 km/kg.
Highway CNG efficiency depends heavily on cruising speed, passenger load, wind and road gradient.
Long-distance users must also plan CNG stops. Pump availability and gas pressure can vary between locations. The amount of gas filled into the tank may also change with temperature and pump compression.
Ertiga Driving Range
The petrol versions use a 45-litre fuel tank.
Using the owner-reported averages:
- The petrol manual could theoretically cover around 845 km.
- The petrol automatic could theoretically cover around 809 km.
Actual usable range will be lower because drivers rarely consume every litre in the tank.
The CNG tank may hold approximately 9 kg of usable gas, although the exact amount varies during each fill. At the tested combined mileage of 22.41 km/kg, the CNG-only range would be approximately 202 km.
The car can continue running on petrol after its CNG supply is depleted.
Also Read: Ultimate Guide to Selling Your Maruti Suzuki Ertiga
Maruti Suzuki Ertiga Fuel Cost Comparison
The following example assumes:
- Monthly driving of 1,500 km
- Petrol manual mileage of 18.77 kmpl
- Petrol automatic mileage of 17.97 kmpl
- CNG mileage of 23.18 km/kg
- Petrol price of ₹100 per litre
- CNG price of ₹80 per kg
The fuel prices are representative figures used only for comparison. Actual prices differ between cities and change over time.
| Expense | Petrol Manual | Petrol Automatic | CNG Manual |
| Monthly distance | 1,500 km | 1,500 km | 1,500 km |
| Estimated monthly fuel cost | ₹7,991 | ₹8,347 | ₹5,177 |
| Estimated annual fuel cost | ₹95,898 | ₹1,00,167 | ₹62,123 |
| Estimated five-year fuel cost | ₹4,79,489 | ₹5,00,835 | ₹3,10,613 |
Under these assumptions, the CNG version could save approximately ₹1.69 lakh over five years compared with the petrol manual.
It could save around ₹1.90 lakh compared with the petrol automatic.
This comparison does not include the CNG version’s higher purchase price, insurance, maintenance or financing costs. Buyers should calculate the break-even period using the on-road prices in their city.
When Does the Ertiga CNG Make Financial Sense?
The CNG version becomes easier to justify as monthly driving increases.
A buyer covering 1,500 to 2,000 km every month may recover the additional purchase price relatively quickly. The exact period depends on local fuel prices and the price difference between comparable Ertiga variants.
CNG may not be suitable when the vehicle covers limited annual mileage. The savings may take several years to offset the higher purchase cost.
Buyers should also consider the inconvenience of CNG queues and the reduced luggage area. These compromises matter more for families taking long trips with seven occupants.
Maruti Suzuki Ertiga Mileage vs Competitors
The Ertiga competes with other affordable three-row family vehicles. Mileage figures should be compared carefully because some rivals use different engines, seating layouts and transmissions.
| Model | Fuel and Transmission | Claimed Mileage |
| Maruti Suzuki Ertiga | Petrol manual | 20.51 kmpl |
| Maruti Suzuki Ertiga | Petrol automatic | 20.30 kmpl |
| Maruti Suzuki Ertiga | CNG manual | 26.11 km/kg |
| Toyota Rumion | Petrol manual | 20.51 kmpl |
| Toyota Rumion | Petrol automatic | 20.11 kmpl |
| Toyota Rumion | CNG manual | 26.11 km/kg |
| Maruti Suzuki XL6 | Petrol manual | 20.97 kmpl |
| Maruti Suzuki XL6 | Petrol automatic | 20.27 kmpl |
| Renault Triber | Petrol manual or AMT | Approximately 17 to 20 kmpl |
The Toyota Rumion is mechanically related to the Ertiga. Its official figures are 20.51 kmpl for the manual, 20.11 kmpl for the automatic and 26.11 km/kg for CNG.
The Maruti Suzuki XL6 uses the same engine family but provides six seats with second-row captain chairs. Its petrol manual delivers up to 20.97 kmpl, while the automatic is rated at 20.27 kmpl.
The Renault Triber is smaller and uses a 72 PS, 1.0-litre petrol engine. It is available with manual and AMT transmissions. Its lower purchase price may appeal to budget-conscious buyers, although performance can feel limited with a full load.
The Ertiga’s key mileage advantage is the availability of a factory-fitted CNG powertrain in a practical seven-seater package.
Also Read: Maruti Suzuki Ertiga Safety Rating: NCAP Rating, Safety Features
Which Maruti Suzuki Ertiga Should You Choose?
Choose the Petrol Manual If:
- You want the most affordable petrol Ertiga.
- You are comfortable using a manual gearbox.
- Your annual driving is moderate.
- You regularly travel on highways.
- You need the complete luggage area.
Choose the Petrol Automatic If:
- Most of your driving involves city traffic.
- Convenience is more important than minimum fuel cost.
- You want smoother operation than an AMT.
- Your annual usage is relatively low.
- You frequently share the vehicle with other drivers.
Choose the Ertiga CNG If:
- You cover substantial distances every month.
- CNG stations are easily accessible.
- Low running cost is the main priority.
- You are comfortable using a manual gearbox.
- Reduced performance and boot space are acceptable.
For frequent commercial use or long daily commutes, the CNG is usually the most economical choice.
For private buyers with moderate usage, the petrol manual offers the best balance. The automatic is the most convenient but has the highest overall fuel expense.
How to Improve Maruti Suzuki Ertiga Mileage
Accelerate gradually and anticipate traffic ahead. This reduces unnecessary braking and repeated acceleration.
Maintain a consistent highway speed. Driving significantly faster increases aerodynamic resistance and fuel consumption.
Shift the manual version smoothly and avoid holding low gears for too long.
Use gentle throttle inputs in the automatic. This encourages earlier upshifts and reduces unnecessary engine speed.
Check tyre pressure before long journeys. Use the recommended pressure for the expected passenger and luggage load.
Avoid carrying unnecessary weight. Remove heavy items when they are no longer required.
Do not idle the engine for extended periods. The idle start-stop function can help during traffic signals.
Keep the engine, air filter, spark plugs and fuel system properly maintained.
CNG owners should use authorised service centres for inspections and system maintenance.
Also Read: Maruti Suzuki Ertiga Alternatives
Summary
The Maruti Suzuki Ertiga petrol manual has a claimed mileage of 20.51 kmpl. Owner-reported figures average approximately 18.77 kmpl.
The petrol automatic is rated at 20.30 kmpl, with an owner-reported average of around 17.97 kmpl.
The CNG version has a claimed mileage of 26.11 km/kg. Independent testing recorded a combined figure of 22.41 km/kg.
CNG offers the lowest fuel cost, while the petrol automatic provides the greatest convenience. The petrol manual remains the most balanced choice for many private buyers.
Actual mileage will depend on traffic, speed, passenger load, air-conditioning use and driving style.
FAQs About Maruti Suzuki Ertiga Real-World Mileage
Q. What is the real-world mileage of the Ertiga petrol manual?
Autocar India lists an owner-reported average of approximately 18.77 kmpl. Mileage may be lower in congested traffic or with seven occupants.
Q. What is the real-world mileage of the Ertiga automatic?
The owner-reported average is approximately 17.97 kmpl. The mechanically related Toyota Rumion automatic returned 14 kmpl in the city and 19 kmpl on the highway during an independent test.
Q. What is the real-world mileage of the Ertiga CNG?
CarWale recorded 18.01 km/kg in the city and 35.6 km/kg on the highway. Its combined tested mileage was 22.41 km/kg.
Q. Can the Ertiga CNG run on petrol?
Yes. The Ertiga CNG is a dual-fuel vehicle. It can continue running on petrol when CNG is unavailable or the CNG tank is empty.
Q. Which Ertiga version has the lowest running cost?
The CNG manual generally has the lowest fuel cost. The petrol manual offers a better balance when monthly driving is limited or CNG stations are inconvenient.
