Ford Focus ST — MPG & Fuel Costs 2025
The larger hot hatch sibling, available with a powerful 2.3 EcoBoost petrol or a torquey 2.0 EcoBlue diesel.
The Ford Focus ST offers practical family space combined with genuine performance credentials. It is available in both five-door hatchback and estate body styles.
Petrol models use a detuned version of the Mustang's 2.3-litre EcoBoost engine, while the diesel version uses a 2.0-litre EcoBlue unit which makes it a highly efficient long-distance cruiser.
Real-world fuel economy varies wildly: the diesel version easily returns 45-50 MPG, while the petrol version averages around 30 MPG under mixed driving conditions.
TL;DR
30 MPG
Real-world petrol
46 MPG
Real-world diesel
52L
Tank capacity
£71.14
Full tank (petrol)
20.7p
Per mile (petrol)
Real-World Fuel Economy: The Ford Focus ST achieves an estimated 30 MPG (petrol) and 46 MPG (diesel) in real-world UK driving conditions, accounting for a 12% WLTP real-world penalty.
Forecourt Fuel Cost: Refueling the 52-litre tank completely costs approximately £71.14 (petrol) or £73.89 (diesel) at average UK fuel price rates.
Fuel economy at a glance
30
Real-world MPG
Petrol
35.8
Official WLTP
Petrol
46
Real-world MPG
Diesel
54.3
Official WLTP
Diesel
Annual fuel costs by mileage
| Annual mileage | Petrol | Diesel |
|---|---|---|
| 5,000 miles/yr | £1036 | £702 |
| 7,400 miles/yr(UK average) | £1534 | £1039 |
| 10,000 miles/yr | £2073 | £1404 |
| 15,000 miles/yr | £3109 | £2106 |
| 20,000 miles/yr | £4146 | £2809 |
| Full tank (52L) | £71.14 | £73.89 |
| Cost per mile | 20.7p | 14.0p |
Based on UK average fuel prices: petrol 136.8p/L · diesel 142.1p/L. Prices updated regularly.
How does the Focus ST compare?
Tips to get better MPG from your Focus ST
For diesel models, utilize the massive low-end torque to pull away without high revs.
Monitor your speed on motorways; the 2.3 petrol gets significantly thirstier above 70 mph.
Keep the intercooler and radiator grilles clear of leaves to ensure efficient charge cooling.
Is the cheaper petrol station worth it?
In a Ford Focus ST achieving ~30 MPG real-world, if you fill 42 litres and the alternative station is 10p/litre cheaper:
£4.20
Gross saving on fuel
£0.62
Cost of 3-mile detour
£3.58
Net saving ✓
You could drive up to 20 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 Ford Focus ST?
The Ford Focus ST achieves approximately 30 MPG in real-world petrol driving — around 12% lower than the official WLTP figure of 35.8 MPG due to real driving conditions. Diesel variants achieve around 46 MPG real-world.
How much does it cost to fill a Ford Focus ST?
The Ford Focus ST has a fuel tank of 52 litres. At the UK average of 136.8p/litre for petrol, a full tank costs approximately £71.14. Diesel costs approximately £73.89 for a full tank.
What is the annual fuel cost for a Ford Focus ST?
At the UK average annual mileage of 7,400 miles and current petrol price of 136.8p/litre, a Ford Focus ST costs approximately £1534 per year in fuel. At 10,000 miles/year the cost rises to £2073. Actual costs vary with your driving style and mileage.
Is it worth driving to a cheaper petrol station in a Ford Focus ST?
In a Ford Focus ST doing ~30 MPG real-world, driving 3 miles round-trip to save 10p/litre on a 42-litre fill nets approximately £3.58 after the extra fuel cost. You could drive up to 20 miles before the saving is eaten up. Use the WorthThePump calculator for your exact situation.
How much does the Ford Focus ST cost per mile in fuel?
The Ford Focus ST costs approximately 20.7p per mile in petrol at current UK prices. Over a typical commute of 30 miles per day, that is approximately £6.21 per day in fuel.
What is the WLTP MPG figure for the Ford Focus ST?
The official WLTP fuel economy figure for the Ford Focus ST is 35.8 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
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