Kia Stonic — MPG & Fuel Costs 2025
Kia's compact crossover. Stylish styling, fun drive dynamics, and utilizing efficient mild-hybrid engines.
TL;DR
44 MPG
Real-world petrol
45L
Tank capacity
£61.56
Full tank (petrol)
14.1p
Per mile (petrol)
Real-World Fuel Economy: The Kia Stonic achieves an estimated 44 MPG in real-world UK driving conditions, accounting for a 12% WLTP real-world penalty.
Forecourt Fuel Cost: Refueling the 45-litre tank completely costs approximately £61.56 at average UK fuel price rates.
Fuel economy at a glance
44
Real-world MPG
Petrol
52.3
Official WLTP
Petrol
Annual fuel costs by mileage
| Annual mileage | Petrol |
|---|---|
| 5,000 miles/yr | £707 |
| 7,400 miles/yr(UK average) | £1046 |
| 10,000 miles/yr | £1413 |
| 15,000 miles/yr | £2120 |
| 20,000 miles/yr | £2827 |
| Full tank (45L) | £61.56 |
| Cost per mile | 14.1p |
Based on UK average fuel prices: petrol 136.8p/L · diesel 142.1p/L. Prices updated regularly.
How does the Stonic compare?
Tips to get better MPG from your Stonic
Allow the mild-hybrid starter-assist to smooth out pull-offs by keeping inputs gentle.
Upshift early to utilize the turbo engine's low-end torque.
Keep tyre pressures at recommended settings to optimize highway cruising MPG.
Is the cheaper petrol station worth it?
In a Kia Stonic achieving ~44 MPG real-world, if you fill 36 litres and the alternative station is 10p/litre cheaper:
£3.60
Gross saving on fuel
£0.42
Cost of 3-mile detour
£3.18
Net saving ✓
You could drive up to 25 miles round-trip before the saving disappears entirely.
Calculate for your exact situationPopular variants
Frequently asked questions
What is the real-world MPG of the Kia Stonic?
The Kia Stonic achieves approximately 44 MPG in real-world petrol driving — around 12% lower than the official WLTP figure of 52.3 MPG due to real driving conditions. Diesel variants achieve around N/A MPG real-world.
How much does it cost to fill a Kia Stonic?
The Kia Stonic has a fuel tank of 45 litres. At the UK average of 136.8p/litre for petrol, a full tank costs approximately £61.56. Diesel costs approximately £63.95 for a full tank.
What is the annual fuel cost for a Kia Stonic?
At the UK average annual mileage of 7,400 miles and current petrol price of 136.8p/litre, a Kia Stonic costs approximately £1046 per year in fuel. At 10,000 miles/year the cost rises to £1413. Actual costs vary with your driving style and mileage.
Is it worth driving to a cheaper petrol station in a Kia Stonic?
In a Kia Stonic doing ~44 MPG real-world, driving 3 miles round-trip to save 10p/litre on a 36-litre fill nets approximately £3.18 after the extra fuel cost. You could drive up to 25 miles before the saving is eaten up. Use the WorthThePump calculator for your exact situation.
How much does the Kia Stonic cost per mile in fuel?
The Kia Stonic costs approximately 14.1p per mile in petrol at current UK prices. Over a typical commute of 30 miles per day, that is approximately £4.23 per day in fuel.
What is the WLTP MPG figure for the Kia Stonic?
The official WLTP fuel economy figure for the Kia Stonic is 52.3 MPG. However, real-world MPG is typically 10–15% lower than WLTP due to cold starts, air conditioning, motorway speeds, and varying loads. WorthThePump uses a 12% real-world penalty to give a more accurate estimate.
Related guides
Find the cheapest fuel for your Stonic
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