Fiat 500X — MPG & Fuel Costs 2025
Fiat's compact family crossover. Distinctive 500 retro style blended with SUV practicality and efficient engine choices.
TL;DR
38 MPG
Real-world petrol
48 MPG
Real-world diesel
48L
Tank capacity
£65.66
Full tank (petrol)
16.4p
Per mile (petrol)
Real-World Fuel Economy: The Fiat 500X achieves an estimated 38 MPG (petrol) and 48 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
38
Real-world MPG
Petrol
44.8
Official WLTP
Petrol
48
Real-world MPG
Diesel
56.5
Official WLTP
Diesel
Annual fuel costs by mileage
| Annual mileage | Petrol | Diesel |
|---|---|---|
| 5,000 miles/yr | £818 | £673 |
| 7,400 miles/yr(UK average) | £1211 | £996 |
| 10,000 miles/yr | £1637 | £1346 |
| 15,000 miles/yr | £2455 | £2019 |
| 20,000 miles/yr | £3273 | £2692 |
| Full tank (48L) | £65.66 | £68.21 |
| Cost per mile | 16.4p | 13.5p |
Based on UK average fuel prices: petrol 136.8p/L · diesel 142.1p/L. Prices updated regularly.
How does the 500X compare?
Tips to get better MPG from your 500X
Cruising at 65 mph on the highway rather than 75 mph improves fuel economy.
Use Eco settings to smooth throttle responses in town.
Ensure tyre pressures are adjusted according to load weight.
Is the cheaper petrol station worth it?
In a Fiat 500X achieving ~38 MPG real-world, if you fill 38 litres and the alternative station is 10p/litre cheaper:
£3.80
Gross saving on fuel
£0.49
Cost of 3-mile detour
£3.31
Net saving ✓
You could drive up to 23 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 Fiat 500X?
The Fiat 500X achieves approximately 38 MPG in real-world petrol driving — around 12% lower than the official WLTP figure of 44.8 MPG due to real driving conditions. Diesel variants achieve around 48 MPG real-world.
How much does it cost to fill a Fiat 500X?
The Fiat 500X 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 Fiat 500X?
At the UK average annual mileage of 7,400 miles and current petrol price of 136.8p/litre, a Fiat 500X costs approximately £1211 per year in fuel. At 10,000 miles/year the cost rises to £1637. Actual costs vary with your driving style and mileage.
Is it worth driving to a cheaper petrol station in a Fiat 500X?
In a Fiat 500X doing ~38 MPG real-world, driving 3 miles round-trip to save 10p/litre on a 38-litre fill nets approximately £3.31 after the extra fuel cost. You could drive up to 23 miles before the saving is eaten up. Use the WorthThePump calculator for your exact situation.
How much does the Fiat 500X cost per mile in fuel?
The Fiat 500X costs approximately 16.4p per mile in petrol at current UK prices. Over a typical commute of 30 miles per day, that is approximately £4.92 per day in fuel.
What is the WLTP MPG figure for the Fiat 500X?
The official WLTP fuel economy figure for the Fiat 500X is 44.8 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
Find the cheapest fuel for your 500X
Enter your registration and we'll calculate whether the cheaper station nearby is worth the detour — factoring in your 500X's real-world MPG.
Try WorthThePump — it's free