Lexus RX — MPG & Fuel Costs 2025
Lexus' premium large SUV, providing absolute luxury, hybrid refinement, and bulletproof mechanical reliability.
TL;DR
33 MPG
Real-world petrol
65L
Tank capacity
£88.92
Full tank (petrol)
18.8p
Per mile (petrol)
Real-World Fuel Economy: The Lexus RX achieves an estimated 33 MPG in real-world UK driving conditions, accounting for a 12% WLTP real-world penalty.
Forecourt Fuel Cost: Refueling the 65-litre tank completely costs approximately £88.92 at average UK fuel price rates.
Fuel economy at a glance
33
Real-world MPG
Petrol
39.2
Official WLTP
Petrol
Annual fuel costs by mileage
| Annual mileage | Petrol |
|---|---|
| 5,000 miles/yr | £942 |
| 7,400 miles/yr(UK average) | £1395 |
| 10,000 miles/yr | £1885 |
| 15,000 miles/yr | £2827 |
| 20,000 miles/yr | £3769 |
| Full tank (65L) | £88.92 |
| Cost per mile | 18.8p |
Based on UK average fuel prices: petrol 136.8p/L · diesel 142.1p/L. Prices updated regularly.
How does the RX compare?
Tips to get better MPG from your RX
The RX is heavy; accelerate smoothly and let the hybrid system cycle into EV mode frequently.
Leverage the hybrid system's regenerative capacity by braking early.
Use Eco settings to smooth out throttle responses.
Is the cheaper petrol station worth it?
In a Lexus RX achieving ~33 MPG real-world, if you fill 52 litres and the alternative station is 10p/litre cheaper:
£5.20
Gross saving on fuel
£0.57
Cost of 3-mile detour
£4.63
Net saving ✓
You could drive up to 28 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 Lexus RX?
The Lexus RX achieves approximately 33 MPG in real-world petrol driving — around 12% lower than the official WLTP figure of 39.2 MPG due to real driving conditions. Diesel variants achieve around N/A MPG real-world.
How much does it cost to fill a Lexus RX?
The Lexus RX has a fuel tank of 65 litres. At the UK average of 136.8p/litre for petrol, a full tank costs approximately £88.92. Diesel costs approximately £92.36 for a full tank.
What is the annual fuel cost for a Lexus RX?
At the UK average annual mileage of 7,400 miles and current petrol price of 136.8p/litre, a Lexus RX costs approximately £1395 per year in fuel. At 10,000 miles/year the cost rises to £1885. Actual costs vary with your driving style and mileage.
Is it worth driving to a cheaper petrol station in a Lexus RX?
In a Lexus RX doing ~33 MPG real-world, driving 3 miles round-trip to save 10p/litre on a 52-litre fill nets approximately £4.63 after the extra fuel cost. You could drive up to 28 miles before the saving is eaten up. Use the WorthThePump calculator for your exact situation.
How much does the Lexus RX cost per mile in fuel?
The Lexus RX costs approximately 18.8p per mile in petrol at current UK prices. Over a typical commute of 30 miles per day, that is approximately £5.64 per day in fuel.
What is the WLTP MPG figure for the Lexus RX?
The official WLTP fuel economy figure for the Lexus RX is 39.2 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 RX
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