Mazda CX-3 — MPG & Fuel Costs 2025
Mazda's stylish compact crossover, based on the Mazda2 platform but with elevated ride height and rugged styling.
TL;DR
41 MPG
Real-world petrol
60 MPG
Real-world diesel
48L
Tank capacity
£65.66
Full tank (petrol)
15.2p
Per mile (petrol)
Real-World Fuel Economy: The Mazda CX-3 achieves an estimated 41 MPG (petrol) and 60 MPG (diesel) in real-world UK driving conditions, accounting for a 12% WLTP real-world penalty.
Forecourt Fuel Cost: Refueling the 48-litre tank completely costs approximately £65.66 (petrol) or £68.21 (diesel) at average UK fuel price rates.
Fuel economy at a glance
41
Real-world MPG
Petrol
48.7
Official WLTP
Petrol
60
Real-world MPG
Diesel
70.6
Official WLTP
Diesel
Annual fuel costs by mileage
| Annual mileage | Petrol | Diesel |
|---|---|---|
| 5,000 miles/yr | £758 | £538 |
| 7,400 miles/yr(UK average) | £1122 | £797 |
| 10,000 miles/yr | £1517 | £1077 |
| 15,000 miles/yr | £2275 | £1615 |
| 20,000 miles/yr | £3034 | £2153 |
| Full tank (48L) | £65.66 | £68.21 |
| Cost per mile | 15.2p | 10.8p |
Based on UK average fuel prices: petrol 136.8p/L · diesel 142.1p/L. Prices updated regularly.
How does the CX-3 compare?
Tips to get better MPG from your CX-3
Opt for the FWD version of the Skyactiv-G to save weight and maximize fuel efficiency.
The naturally aspirated 2.0 petrol has excellent compression; drive smoothly to yield great MPG.
Keep tyre pressures checked; this crossover is highly sensitive to rolling resistance.
Is the cheaper petrol station worth it?
In a Mazda CX-3 achieving ~41 MPG real-world, if you fill 38 litres and the alternative station is 10p/litre cheaper:
£3.80
Gross saving on fuel
£0.46
Cost of 3-mile detour
£3.34
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 Mazda CX-3?
The Mazda CX-3 achieves approximately 41 MPG in real-world petrol driving — around 12% lower than the official WLTP figure of 48.7 MPG due to real driving conditions. Diesel variants achieve around 60 MPG real-world.
How much does it cost to fill a Mazda CX-3?
The Mazda CX-3 has a fuel tank of 48 litres. At the UK average of 136.8p/litre for petrol, a full tank costs approximately £65.66. Diesel costs approximately £68.21 for a full tank.
What is the annual fuel cost for a Mazda CX-3?
At the UK average annual mileage of 7,400 miles and current petrol price of 136.8p/litre, a Mazda CX-3 costs approximately £1122 per year in fuel. At 10,000 miles/year the cost rises to £1517. Actual costs vary with your driving style and mileage.
Is it worth driving to a cheaper petrol station in a Mazda CX-3?
In a Mazda CX-3 doing ~41 MPG real-world, driving 3 miles round-trip to save 10p/litre on a 38-litre fill nets approximately £3.34 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 Mazda CX-3 cost per mile in fuel?
The Mazda CX-3 costs approximately 15.2p per mile in petrol at current UK prices. Over a typical commute of 30 miles per day, that is approximately £4.56 per day in fuel.
What is the WLTP MPG figure for the Mazda CX-3?
The official WLTP fuel economy figure for the Mazda CX-3 is 48.7 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 CX-3
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