Lexus LS — MPG & Fuel Costs 2025
Lexus's legendary flagship luxury saloon, renowned for its bulletproof reliability, supreme quietness, and high refinement.
The Lexus LS is the car that launched the Lexus brand, designed to offer Mercedes S-Class luxury with Toyota's legendary reliability.
It features smooth V8 petrol engines and, in later generations, advanced V8 hybrid systems designed for high performance and cruising comfort.
Running an LS means higher fuel costs. A real-world average of 25-30 MPG is typical for mixed driving.
TL;DR
30 MPG
Real-world petrol
25 MPG
Real-world diesel
82L
Tank capacity
£112.18
Full tank (petrol)
20.7p
Per mile (petrol)
Real-World Fuel Economy: The Lexus LS achieves an estimated 30 MPG (petrol) and 25 MPG (diesel) in real-world UK driving conditions, accounting for a 12% WLTP real-world penalty.
Forecourt Fuel Cost: Refueling the 82-litre tank completely costs approximately £112.18 (petrol) or £116.52 (diesel) at average UK fuel price rates.
Fuel economy at a glance
30
Real-world MPG
Petrol
36.2
Official WLTP
Petrol
25
Real-world MPG
Diesel
29.4
Official WLTP
Diesel
Annual fuel costs by mileage
| Annual mileage | Petrol | Diesel |
|---|---|---|
| 5,000 miles/yr | £1036 | £1292 |
| 7,400 miles/yr(UK average) | £1534 | £1912 |
| 10,000 miles/yr | £2073 | £2584 |
| 15,000 miles/yr | £3109 | £3876 |
| 20,000 miles/yr | £4146 | £5168 |
| Full tank (82L) | £112.18 | £116.52 |
| Cost per mile | 20.7p | 25.8p |
Based on UK average fuel prices: petrol 136.8p/L · diesel 142.1p/L. Prices updated regularly.
How does the LS compare?
Tips to get better MPG from your LS
The V8 engines are thirsty; keep acceleration progressive to manage fuel usage.
Use cruise control extensively on long highway runs.
Ensure tyre pressures are adjusted correctly to prevent rolling resistance.
Is the cheaper petrol station worth it?
In a Lexus LS achieving ~30 MPG real-world, if you fill 66 litres and the alternative station is 10p/litre cheaper:
£6.60
Gross saving on fuel
£0.62
Cost of 3-mile detour
£5.98
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 Lexus LS?
The Lexus LS achieves approximately 30 MPG in real-world petrol driving — around 12% lower than the official WLTP figure of 36.2 MPG due to real driving conditions. Diesel variants achieve around 25 MPG real-world.
How much does it cost to fill a Lexus LS?
The Lexus LS has a fuel tank of 82 litres. At the UK average of 136.8p/litre for petrol, a full tank costs approximately £112.18. Diesel costs approximately £116.52 for a full tank.
What is the annual fuel cost for a Lexus LS?
At the UK average annual mileage of 7,400 miles and current petrol price of 136.8p/litre, a Lexus LS costs approximately £1534 per year in fuel. At 10,000 miles/year the cost rises to £2073. Actual costs vary with your driving style and mileage.
Is it worth driving to a cheaper petrol station in a Lexus LS?
In a Lexus LS doing ~30 MPG real-world, driving 3 miles round-trip to save 10p/litre on a 66-litre fill nets approximately £5.98 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 Lexus LS cost per mile in fuel?
The Lexus LS costs approximately 20.7p per mile in petrol at current UK prices. Over a typical commute of 30 miles per day, that is approximately £6.21 per day in fuel.
What is the WLTP MPG figure for the Lexus LS?
The official WLTP fuel economy figure for the Lexus LS is 36.2 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 LS
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