The Maruti Suzuki WagonR has sold on one promise since 1999: it will not drink your money. Buyers cross-shop it against the Alto K10, the Celerio, and the S-Presso mainly on one spec sheet line, mileage. This guide lays out the real ARAI figures, what owners see on the road, and a WagonR mileage calculator you use with your own numbers instead of guessing.
Every figure below comes from Maruti Suzuki’s official specifications, ARAI certification data, and independent test reports. Where a claim looks too good, we say so.
Last Updated : 1 Aug 2026
WagonR Mileage Calculator
Use the tool below in two ways. Enter your last fuel fill and the distance you covered to work out your actual mileage, or plug in a mileage figure to see your monthly and yearly fuel cost.
Fuel Efficiency Tool
WagonR Mileage Calculator
Default figures use the Maruti Suzuki WagonR’s ARAI-rated CNG mileage (34.05 km/kg) and Delhi’s retail CNG rate for late July 2026. Slide to petrol above if that’s your variant. Swap in your own odometer reading, fuel bill, and local price for an accurate result. This tool is for planning only, not a substitute for your actual fuel receipts.
Quick Answer
The WagonR’s ARAI-certified mileage runs from 23.56 km/l on the 1.2L manual petrol up to 25.19 km/l on the 1.0L automatic petrol, and 34.05 km/kg on the CNG variant. Real-world city driving brings that down to roughly 14 to 17 km/l for petrol and 22 to 26 km/kg for CNG, based on independent road tests and owner-reported figures.
Maruti WagonR ARAI Mileage: Every Variant
Maruti Suzuki sells the WagonR with two petrol engines, a 1.0L K10C and a 1.2L K12N, plus a CNG option built on the 1.0L unit. Each combination carries its own ARAI-certified figure, taken from Maruti Suzuki’s official specification sheet.
| Variant | Transmission | ARAI mileage |
|---|---|---|
| 1.0L Petrol | Manual | 24.35 km/l |
| 1.0L Petrol | AGS (automatic) | 25.19 km/l |
| 1.2L Petrol | Manual | 23.56 km/l |
| 1.2L Petrol | AGS (automatic) | 24.43 km/l |
| 1.0L CNG | Manual | 34.05 km/kg |
The automatic petrol variant edges out the manual on paper, which surprises most buyers used to thinking manual gearboxes save more fuel. Maruti’s AGS unit shifts early and keeps the small engine in its efficient rev range, which explains the gap.
Real-World WagonR Mileage: What Owners Get on the Road
ARAI figures come from a lab test on a rolling road, with no traffic signals, no AC load, and a fixed driving cycle. Your commute has all three. Spinny’s owner and road-test data puts real-world WagonR mileage at 14 to 17 km/l for petrol in city traffic, against the ARAI claim of 24.35 to 25.19 km/l.
CNG holds up somewhat better against its own claim. Owners report 22 to 26 km/kg in the city and 27 to 31 km/kg on the highway, against an ARAI figure of 34.05 km/kg. One CarWale owner review even logged 27.25 km/kg over sustained use, which sits close to the lab number.
The pattern repeats across nearly every small car in India: CNG mileage drops less from ARAI to real-world than petrol mileage does, mainly because CNG combustion stays more consistent regardless of throttle input.
Compare CNG vs Petrol vs Diesel running costs of your Car : Click here
How to Calculate Your Own WagonR Mileage
Brochure numbers help you compare cars at the showroom. They don’t tell you what your WagonR costs to run day to day. Work it out yourself with three steps:
- Fill your tank completely and note the odometer reading.
- Drive normally until the tank runs low, then fill it again, completely, and note the new odometer reading.
- Divide distance by fuel used. Subtract the two odometer readings to get distance covered, then divide that by the litres or kilograms of fuel it took to fill up again.
For example, if you covered 400 km and needed 17 litres to refill, your real mileage is 400 ÷ 17, or 23.5 km/l. The calculator above does this division instantly and also flags how your number compares against the ARAI claim.
WagonR Running Cost: Petrol vs CNG
Delhi’s fuel prices, as of late July 2026, stood at ₹102.12 a litre for petrol and ₹83.09 a kg for CNG, according to CarDekho and Goodreturns fuel trackers. Running the WagonR’s real-world mileage figures through those rates gives a clear cost picture.
At 15 km/l petrol, cost per kilometre works out to ₹6.81. At 24 km/kg CNG, cost per kilometre drops to ₹3.46. That’s a saving close to 49 percent per kilometre, which lines up with the wider CNG versus petrol comparisons published across the Indian auto press.
Drive 1,200 km a month, a fair average for a city-first hatchback, and the petrol WagonR costs about ₹8,172 a month in fuel. The CNG version costs about ₹4,152. That’s a saving of roughly ₹4,020 every month, or close to ₹48,240 a year, before accounting for the CNG variant’s higher purchase price.
Fuel Tank Capacity and Full-Tank Range
The petrol WagonR carries a 32-litre tank, confirmed on Maruti Suzuki’s official site and across every major listing platform. At the ARAI-rated 24.35 km/l, a full tank theoretically covers about 779 km on the manual, or slightly more on the automatic.
The CNG variant uses a 60-litre water-equivalent cylinder, which holds roughly 8 to 9 kg of usable CNG. At the ARAI-rated 34.05 km/kg, that translates to a range of around 272 to 300 km on gas alone, after which the WagonR switches back to its 35-litre petrol backup tank automatically.
What Affects Your WagonR’s Mileage
Several factors pull real mileage away from the ARAI number, and most sit within your control:
- Traffic and idling. Stop-start city driving burns more fuel per kilometre than a steady highway cruise, for petrol and CNG alike.
- Air conditioning. Running the AC continuously in city traffic cuts mileage by a noticeable margin, since the compressor draws power straight from the engine.
- Tyre pressure. Underinflated tyres increase rolling resistance, which forces the engine to work harder for the same distance.
- Load and passengers. A fully loaded WagonR with four passengers and luggage weighs more than the single-driver test condition ARAI uses.
- Driving style. Hard acceleration and late braking waste fuel that smooth, anticipatory driving would save.
- Engine choice. The 1.0L returns better mileage than the 1.2L on paper, since it has less displacement to fuel per stroke.
Tips to Improve Your WagonR’s Mileage
None of these tricks are exclusive to the WagonR, but they apply directly to it:
- Keep tyres inflated to the pressure listed on the door jamb sticker, checked when the tyres are cold.
- Service the car on schedule, since a clean air filter and fresh engine oil both help combustion efficiency.
- Avoid warming up the engine at idle for long stretches, since driving off gently after a few seconds works better.
- Use the AC only when needed instead of running it on every short trip.
- Shift up early on the manual variant, since the WagonR’s engine stays efficient at lower revs.
- On the CNG variant, get the kit inspected on Maruti’s recommended interval so the gas mixture stays properly tuned.
How much CNG required for 100 km? : Click here
WagonR Mileage vs Rivals
Buyers rarely shop the WagonR in isolation. Here’s how its ARAI figures stack up against the Alto K10, Celerio, and S-Presso, all Maruti Suzuki hatchbacks aimed at the same budget-conscious buyer.
| Car | Petrol mileage (ARAI) | CNG mileage (ARAI) |
|---|---|---|
| Maruti Alto K10 | 24.39 to 24.9 km/l | 33.85 km/kg |
| Maruti S-Presso | 24.12 to 25.3 km/l | 32.73 km/kg |
| Maruti Celerio | 25.24 to 26.68 km/l | 34.43 km/kg |
| Maruti WagonR | 23.56 to 25.19 km/l | 34.05 km/kg |
The Celerio claims the highest petrol figure in this group, while the WagonR’s CNG variant sits close behind it. In practice, the difference between these four cars rarely exceeds 2 to 3 km/l, so mileage alone shouldn’t decide your purchase. Space, ground clearance, and features usually matter more once you’re this close on efficiency.
Petrol or CNG WagonR: Which One Fits You
Mileage numbers only matter against your own driving pattern. A rough guide, based on the running cost gap shown above:
- Under 500 km a month: The petrol WagonR keeps things simple. At low distances, the CNG variant’s higher purchase price takes years to earn back through fuel savings.
- 500 to 1,200 km a month: This is where most private buyers sit, and it’s close to a toss-up. CNG starts pulling ahead if you plan to keep the car five years or more.
- Over 1,200 km a month, or daily cab or delivery use: CNG wins clearly. The fuel saving compounds fast enough that the price gap between variants closes within the first year or two of ownership.
- Frequent long highway drives: The petrol variant keeps its power delivery intact, since CNG mode trims peak output slightly. Buyers who value overtaking punch over running cost tend to prefer petrol here.
One more point worth flagging: CNG availability still varies by city. Even with strong fuel savings on paper, a long queue at your nearest station eats into the time you save on cost. Check station density in your area before you commit to the CNG variant.
Common Mistakes That Quietly Hurt WagonR Mileage
A few habits show up again and again in owner forums and service center feedback, and they cost more mileage than most drivers realize:
- Skipping the first service. Maruti’s early service intervals exist partly to check the initial fuel-air mixture and injector settings, which affects efficiency from day one.
- Ignoring the CNG kit’s recommended check-up. A poorly tuned kit burns more gas per kilometre without any obvious symptom beyond a slowly rising fuel bill.
- Riding the clutch or brake. Partial clutch engagement or light brake drag, common in heavy traffic, forces the engine to work against resistance it shouldn’t have to fight.
- Carrying unnecessary weight. Roof racks, unused child seats, or a boot full of tools add up over months of driving, even though no single item feels heavy on its own.
Fixing these costs little to nothing and often closes a meaningful part of the gap between your real mileage and the ARAI number.
Frequently Asked Questions
What is the actual mileage of WagonR CNG?
The ARAI-certified figure is 34.05 km/kg. Real-world city driving typically returns 22 to 26 km/kg, rising to 27 to 31 km/kg on the highway.
Which WagonR variant gives the best mileage?
The CNG variant leads on paper and in practice, followed by the 1.0L petrol automatic at 25.19 km/l ARAI. The 1.2L manual sits at the bottom of the range, at 23.56 km/l.
Is WagonR CNG worth it over petrol?
For most owners driving over 800 to 1,000 km a month, yes. The fuel cost saving, close to 49 percent per kilometre at current Delhi prices, adds up fast, though the CNG variant costs more upfront and gives up some boot space to the cylinder.
How do I calculate my WagonR’s real mileage myself?
Fill the tank fully, drive as usual until it runs low, refill fully again, and divide the distance covered by the fuel needed for the second fill. The calculator above automates this step.
Why is my mileage lower than the ARAI figure?
ARAI tests run in lab conditions with no traffic, no AC, and a single occupant. Daily driving adds all three, which is why owners typically see 15 to 40 percent lower mileage than the certified number, depending on driving conditions.
Does the 1.0L or 1.2L WagonR give better mileage?
The 1.0L engine wins on paper across both petrol and CNG, since it burns less fuel per stroke than the 1.2L. The 1.2L trades some efficiency for stronger mid-range power, which matters more on highways or with a full car.
How often should I service the WagonR CNG kit?
Maruti recommends a check at every scheduled service, with the CNG cylinder itself due for mandatory hydrotesting every three years under PESO safety rules. A neglected kit loses efficiency well before it becomes a safety concern, so don’t wait for a warning sign.