BMW X6 — MPG & Fuel Costs 2025
The original sports activity coupe. Large, imposing, and comfortable, with high fuel costs in petrol variants.
TL;DR
23 MPG
Real-world petrol
33 MPG
Real-world diesel
80L
Tank capacity
£109.44
Full tank (petrol)
27.0p
Per mile (petrol)
Real-World Fuel Economy: The BMW X6 achieves an estimated 23 MPG (petrol) and 33 MPG (diesel) in real-world UK driving conditions, accounting for a 12% WLTP real-world penalty.
Forecourt Fuel Cost: Refueling the 80-litre tank completely costs approximately £109.44 (petrol) or £113.68 (diesel) at average UK fuel price rates.
Fuel economy at a glance
23
Real-world MPG
Petrol
27.7
Official WLTP
Petrol
33
Real-world MPG
Diesel
39.2
Official WLTP
Diesel
Annual fuel costs by mileage
| Annual mileage | Petrol | Diesel |
|---|---|---|
| 5,000 miles/yr | £1352 | £979 |
| 7,400 miles/yr(UK average) | £2001 | £1449 |
| 10,000 miles/yr | £2704 | £1958 |
| 15,000 miles/yr | £4056 | £2936 |
| 20,000 miles/yr | £5408 | £3915 |
| Full tank (80L) | £109.44 | £113.68 |
| Cost per mile | 27.0p | 19.6p |
Based on UK average fuel prices: petrol 136.8p/L · diesel 142.1p/L. Prices updated regularly.
How does the X6 compare?
Tips to get better MPG from your X6
The X6 is massive and heavy; avoid aggressive starts to keep fuel consumption down.
Keep highway cruising speed at 60-65 mph to minimize aerodynamic drag.
Adjust tyre pressures according to load specifications.
Is the cheaper petrol station worth it?
In a BMW X6 achieving ~23 MPG real-world, if you fill 64 litres and the alternative station is 10p/litre cheaper:
£6.40
Gross saving on fuel
£0.81
Cost of 3-mile detour
£5.59
Net saving ✓
You could drive up to 24 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 BMW X6?
The BMW X6 achieves approximately 23 MPG in real-world petrol driving — around 12% lower than the official WLTP figure of 27.7 MPG due to real driving conditions. Diesel variants achieve around 33 MPG real-world.
How much does it cost to fill a BMW X6?
The BMW X6 has a fuel tank of 80 litres. At the UK average of 136.8p/litre for petrol, a full tank costs approximately £109.44. Diesel costs approximately £113.68 for a full tank.
What is the annual fuel cost for a BMW X6?
At the UK average annual mileage of 7,400 miles and current petrol price of 136.8p/litre, a BMW X6 costs approximately £2001 per year in fuel. At 10,000 miles/year the cost rises to £2704. Actual costs vary with your driving style and mileage.
Is it worth driving to a cheaper petrol station in a BMW X6?
In a BMW X6 doing ~23 MPG real-world, driving 3 miles round-trip to save 10p/litre on a 64-litre fill nets approximately £5.59 after the extra fuel cost. You could drive up to 24 miles before the saving is eaten up. Use the WorthThePump calculator for your exact situation.
How much does the BMW X6 cost per mile in fuel?
The BMW X6 costs approximately 27.0p per mile in petrol at current UK prices. Over a typical commute of 30 miles per day, that is approximately £8.10 per day in fuel.
What is the WLTP MPG figure for the BMW X6?
The official WLTP fuel economy figure for the BMW X6 is 27.7 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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