Peugeot 508 — MPG & Fuel Costs 2025
Peugeot's striking executive fastback and estate. High comfort, premium cabin tech, and highly efficient BlueHDi diesel cruise economy.
TL;DR
40 MPG
Real-world petrol
52 MPG
Real-world diesel
62L
Tank capacity
£84.82
Full tank (petrol)
15.5p
Per mile (petrol)
Real-World Fuel Economy: The Peugeot 508 achieves an estimated 40 MPG (petrol) and 52 MPG (diesel) in real-world UK driving conditions, accounting for a 12% WLTP real-world penalty.
Forecourt Fuel Cost: Refueling the 62-litre tank completely costs approximately £84.82 (petrol) or £88.10 (diesel) at average UK fuel price rates.
Fuel economy at a glance
40
Real-world MPG
Petrol
47.9
Official WLTP
Petrol
52
Real-world MPG
Diesel
61.4
Official WLTP
Diesel
Annual fuel costs by mileage
| Annual mileage | Petrol | Diesel |
|---|---|---|
| 5,000 miles/yr | £777 | £621 |
| 7,400 miles/yr(UK average) | £1151 | £919 |
| 10,000 miles/yr | £1555 | £1242 |
| 15,000 miles/yr | £2332 | £1863 |
| 20,000 miles/yr | £3109 | £2485 |
| Full tank (62L) | £84.82 | £88.10 |
| Cost per mile | 15.5p | 12.4p |
Based on UK average fuel prices: petrol 136.8p/L · diesel 142.1p/L. Prices updated regularly.
How does the 508 compare?
Tips to get better MPG from your 508
The 508 has a low, sleek profile; steady highway cruises yield excellent MPG.
Engage cruise control on long motorway runs to keep engine RPM steady.
Check tyre pressures regularly to prevent rolling resistance.
Is the cheaper petrol station worth it?
In a Peugeot 508 achieving ~40 MPG real-world, if you fill 50 litres and the alternative station is 10p/litre cheaper:
£5.00
Gross saving on fuel
£0.47
Cost of 3-mile detour
£4.53
Net saving ✓
You could drive up to 32 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 Peugeot 508?
The Peugeot 508 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 52 MPG real-world.
How much does it cost to fill a Peugeot 508?
The Peugeot 508 has a fuel tank of 62 litres. At the UK average of 136.8p/litre for petrol, a full tank costs approximately £84.82. Diesel costs approximately £88.10 for a full tank.
What is the annual fuel cost for a Peugeot 508?
At the UK average annual mileage of 7,400 miles and current petrol price of 136.8p/litre, a Peugeot 508 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 Peugeot 508?
In a Peugeot 508 doing ~40 MPG real-world, driving 3 miles round-trip to save 10p/litre on a 50-litre fill nets approximately £4.53 after the extra fuel cost. You could drive up to 32 miles before the saving is eaten up. Use the WorthThePump calculator for your exact situation.
How much does the Peugeot 508 cost per mile in fuel?
The Peugeot 508 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 Peugeot 508?
The official WLTP fuel economy figure for the Peugeot 508 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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