Citroen C5 X — MPG & Fuel Costs 2025
Citroen's unique blend of saloon, estate, and SUV ride comfort. Extremely comfortable cruise characteristics and efficient PureTech engines.
TL;DR
40 MPG
Real-world petrol
52L
Tank capacity
£71.14
Full tank (petrol)
15.5p
Per mile (petrol)
Real-World Fuel Economy: The Citroen C5 X achieves an estimated 40 MPG 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 at average UK fuel price rates.
Fuel economy at a glance
40
Real-world MPG
Petrol
47.9
Official WLTP
Petrol
Annual fuel costs by mileage
| Annual mileage | Petrol |
|---|---|
| 5,000 miles/yr | £777 |
| 7,400 miles/yr(UK average) | £1151 |
| 10,000 miles/yr | £1555 |
| 15,000 miles/yr | £2332 |
| 20,000 miles/yr | £3109 |
| Full tank (52L) | £71.14 |
| Cost per mile | 15.5p |
Based on UK average fuel prices: petrol 136.8p/L · diesel 142.1p/L. Prices updated regularly.
How does the C5 X compare?
Tips to get better MPG from your C5 X
Use cruise control on long motorway runs to keep the large body cruising efficiently.
PHEV owners should charge nightly to maximize fuel economy.
Select standard driving modes rather than Sport mode to maintain a smoother throttle curve.
Is the cheaper petrol station worth it?
In a Citroen C5 X achieving ~40 MPG real-world, if you fill 42 litres and the alternative station is 10p/litre cheaper:
£4.20
Gross saving on fuel
£0.47
Cost of 3-mile detour
£3.73
Net saving ✓
You could drive up to 27 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 Citroen C5 X?
The Citroen C5 X achieves approximately 40 MPG in real-world petrol driving — around 12% lower than the official WLTP figure of 47.9 MPG due to real driving conditions. Diesel variants achieve around N/A MPG real-world.
How much does it cost to fill a Citroen C5 X?
The Citroen C5 X 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 Citroen C5 X?
At the UK average annual mileage of 7,400 miles and current petrol price of 136.8p/litre, a Citroen C5 X costs approximately £1151 per year in fuel. At 10,000 miles/year the cost rises to £1555. Actual costs vary with your driving style and mileage.
Is it worth driving to a cheaper petrol station in a Citroen C5 X?
In a Citroen C5 X doing ~40 MPG real-world, driving 3 miles round-trip to save 10p/litre on a 42-litre fill nets approximately £3.73 after the extra fuel cost. You could drive up to 27 miles before the saving is eaten up. Use the WorthThePump calculator for your exact situation.
How much does the Citroen C5 X cost per mile in fuel?
The Citroen C5 X costs approximately 15.5p per mile in petrol at current UK prices. Over a typical commute of 30 miles per day, that is approximately £4.65 per day in fuel.
What is the WLTP MPG figure for the Citroen C5 X?
The official WLTP fuel economy figure for the Citroen C5 X is 47.9 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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