Peugeot 308 — MPG & Fuel Costs 2025
Peugeot's family hatchback, now with plug-in hybrid options. Sharp styling, high-tech interior, and efficient engines.
The Peugeot 308 is a sharp-looking family hatchback that showcases Peugeot's latest design language and premium brand ambitions. It features a high-tech cabin, digital cockpit, and a range of highly efficient engines.
Engines include the refined 1.2-litre PureTech petrol, the 1.5-litre BlueHDi diesel, and plug-in hybrid options. The PHEV version can travel up to 37 miles on pure electricity, making it highly economical for daily commutes.
Daily drivers can expect around 43 MPG from the petrol model. The diesel version is a brilliant motorway cruiser, returning an average of 53 MPG in real-world driving conditions.
TL;DR
43 MPG
Real-world petrol
53 MPG
Real-world diesel
52L
Tank capacity
£71.14
Full tank (petrol)
14.5p
Per mile (petrol)
Real-World Fuel Economy: The Peugeot 308 achieves an estimated 43 MPG (petrol) and 53 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
43
Real-world MPG
Petrol
51.4
Official WLTP
Petrol
53
Real-world MPG
Diesel
62.8
Official WLTP
Diesel
Annual fuel costs by mileage
| Annual mileage | Petrol | Diesel |
|---|---|---|
| 5,000 miles/yr | £723 | £609 |
| 7,400 miles/yr(UK average) | £1070 | £902 |
| 10,000 miles/yr | £1446 | £1219 |
| 15,000 miles/yr | £2169 | £1828 |
| 20,000 miles/yr | £2893 | £2438 |
| Full tank (52L) | £71.14 | £73.89 |
| Cost per mile | 14.5p | 12.2p |
Based on UK average fuel prices: petrol 136.8p/L · diesel 142.1p/L. Prices updated regularly.
How does the 308 compare?
Tips to get better MPG from your 308
Charge the PHEV battery nightly to maximize electric-only running for commutes under 30 miles.
Use Eco mode on the automatic models to keep the gearbox in higher gears for longer, lowering engine RPM.
Check wheel alignment annually to prevent tyre scrub and optimize fuel efficiency.
Is the cheaper petrol station worth it?
In a Peugeot 308 achieving ~43 MPG real-world, if you fill 42 litres and the alternative station is 10p/litre cheaper:
£4.20
Gross saving on fuel
£0.43
Cost of 3-mile detour
£3.77
Net saving ✓
You could drive up to 29 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 308?
The Peugeot 308 achieves approximately 43 MPG in real-world petrol driving — around 12% lower than the official WLTP figure of 51.4 MPG due to real driving conditions. Diesel variants achieve around 53 MPG real-world.
How much does it cost to fill a Peugeot 308?
The Peugeot 308 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 Peugeot 308?
At the UK average annual mileage of 7,400 miles and current petrol price of 136.8p/litre, a Peugeot 308 costs approximately £1070 per year in fuel. At 10,000 miles/year the cost rises to £1446. Actual costs vary with your driving style and mileage.
Is it worth driving to a cheaper petrol station in a Peugeot 308?
In a Peugeot 308 doing ~43 MPG real-world, driving 3 miles round-trip to save 10p/litre on a 42-litre fill nets approximately £3.77 after the extra fuel cost. You could drive up to 29 miles before the saving is eaten up. Use the WorthThePump calculator for your exact situation.
How much does the Peugeot 308 cost per mile in fuel?
The Peugeot 308 costs approximately 14.5p per mile in petrol at current UK prices. Over a typical commute of 30 miles per day, that is approximately £4.35 per day in fuel.
What is the WLTP MPG figure for the Peugeot 308?
The official WLTP fuel economy figure for the Peugeot 308 is 51.4 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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