Australia’s Most Fuel-Efficient Diesel Cars of 2025

Introduction: Why Diesel Still Matters in 2025 Australia

While hybrid and electric vehicles dominate headlines, Australia’s vast geography and remote travel needs keep diesel cars relevant. In 2025, diesel vehicles remain a go-to choice for those who demand long driving range, towing capability, and fuel economy—especially for highway driving. With advancements in clean diesel tech, many models have managed to balance power with low consumption.

Whether you’re covering long regional distances, towing caravans, or simply want a more frugal vehicle for everyday use, this guide to the most fuel-efficient diesel cars in Australia for 2025 will help you pick the right model. Let’s dive into the diesel-powered champions offering the best km/L figures without compromising performance.

1. Mazda CX-5 D35 Touring Active Diesel AWD

• Fuel Economy (Combined): 5.7 L/100km

• Engine: 2.2L twin-turbo diesel

• Drive: AWD

• Transmission: 6-speed automatic

• Price (approx): $49,000

Why it’s a top pick:
The CX-5 D35 diesel variant remains one of the most refined diesel SUVs in its class. With a punchy 2.2L engine and torque-rich performance, it’s perfect for Aussie families that drive long distances or head off the beaten track. The AWD system offers grip, and despite the power, the fuel economy stays under 6L/100km—impressive for an SUV.

2. Hyundai Tucson Elite Diesel AWD

• Fuel Economy (Combined): 6.3 L/100km

• Engine: 2.0L turbo diesel

• Drive: AWD

• Transmission: 8-speed auto

• Price (approx): $46,500

Why it’s a top pick:
The Tucson Elite diesel is efficient, tech-rich, and stylish. The smooth 8-speed transmission ensures relaxed cruising on highways, and the diesel engine is remarkably quiet. With fuel efficiency under 6.5L/100km, it’s a smart SUV choice that doesn’t skimp on features like smart cruise, large touchscreen, and wireless charging.

3. Toyota Fortuner GX

• Fuel Economy (Combined): 7.6 L/100km

• Engine: 2.8L turbo diesel

• Drive: 4x4

• Transmission: 6-speed auto

• Price (approx): $53,775

Why it’s a top pick:
Built on the HiLux chassis, the Fortuner is for families who love off-road adventures. The diesel powerplant is reliable, and even with 4WD capability and a heavier body, it returns commendable efficiency under 8L/100km. It’s a no-frills powerhouse with unbeatable dependability.

4. Isuzu D-MAX SX 4x2 Single Cab Chassis

• Fuel Economy (Combined): 6.7 L/100km

• Engine: 3.0L turbo diesel

• Drive: 4x2

• Transmission: 6-speed manual/auto

• Price (approx): $34,000

Why it’s a top pick:
Tradies and rural drivers love the D-MAX for good reason—it’s tough, efficient, and cost-effective. This 4x2 variant offers excellent fuel economy and the legendary Isuzu diesel durability. Even with a full tray and gear, it handles loads easily without guzzling diesel.

5. Skoda Octavia RS TDI (2024 carry-over model)

• Fuel Economy (Combined): 5.0 L/100km

• Engine: 2.0L turbo diesel

• Drive: FWD

• Transmission: 7-speed DSG

• Price (approx): $52,000

Why it’s a top pick:
A rare diesel sports wagon, the Octavia RS blends sporty character with exceptional efficiency. Offering European refinement and highway fuel economy of just 5L/100km, it’s a sleeper hit among diesel aficionados. It’s also spacious, premium, and fast when needed.

6. Peugeot 3008 GT Diesel

• Fuel Economy (Combined): 5.0 L/100km

• Engine: 2.0L HDi diesel

• Drive: FWD

• Transmission: 8-speed auto

• Price (approx): $58,000

Why it’s a top pick:
The Peugeot 3008 GT diesel offers the best of French design and diesel engineering. With a premium interior and excellent economy, this diesel SUV is a great alternative to Japanese models, especially for inner-city fuel efficiency and highway range.

7. LDV T60 Max Luxe

• Fuel Economy (Combined): 8.9 L/100km

• Engine: 2.0L bi-turbo diesel

• Drive: 4x4

• Transmission: 8-speed auto

• Price (approx): $41,042

Why it’s a top pick:
While it’s not the most frugal, the LDV T60 Max Luxe offers strong value. You get 160kW of power, a rugged 4WD system, and decent towing for under $45K. For the price, its economy isn’t bad—especially if you're hauling or adventuring regularly.

8. Ford Everest Ambiente 4WD

• Fuel Economy (Combined): 7.1 L/100km

• Engine: 2.0L Bi-Turbo diesel

• Drive: 4WD

• Transmission: 10-speed auto

• Price (approx): $58,000

Why it’s a top pick:
This full-sized SUV doesn’t compromise on power, towing, or economy. The bi-turbo engine paired with a 10-speed auto makes cruising smooth and efficient. It’s a top diesel SUV for families that enjoy towing and touring.

9. Toyota HiLux 2.8L Diesel SR5 (Dual Cab)

• Fuel Economy (Combined): 7.9 L/100km

• Engine: 2.8L turbo diesel

• Drive: 4x4

• Transmission: 6-speed auto

• Price (approx): $58,000

Why it’s a top pick:
Australia’s favourite ute continues to dominate. The SR5 trim blends capability, comfort, and economy. The fuel economy is solid considering its size and capability—plus Toyota reliability is a big bonus.

10. Volkswagen Golf 110TDI Life (Discontinued in 2024)

• Fuel Economy (Combined): 4.9 L/100km

• Engine: 2.0L turbo diesel

• Drive: FWD

• Transmission: 7-speed DSG

• Price (last known): ~$36,000

Why it’s a top pick:
Though discontinued, this model is available used and is a fantastic city-friendly diesel hatchback. Its low fuel consumption makes it an excellent urban commuter for budget-conscious Aussies.

Why Diesel Still Works for Aussies in 2025

✔️ Long-Range Capability

Most diesel vehicles can run well over 900km on a single tank, making them ideal for rural and regional drivers.

✔️ Strong Torque

Perfect for towing caravans, boats, or work trailers, diesel engines still dominate in torque delivery.

✔️ Lower Running Costs (in some cases)

Despite higher diesel prices per litre, the improved mileage often means lower fuel bills over time.

✔️ Proven Reliability

Brands like Toyota, Mazda, and Isuzu have built reputations for making ultra-durable diesel engines.

Fuel Efficiency Comparison Chart (Top Models)

Tips to Maximise Diesel Fuel Economy

• Keep tyres inflated properly

• Avoid excessive idling

• Use cruise control on highways

• Maintain regular servicing

• Lighten your load where possible

• Drive smoothly—less throttle = more savings

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Final Thoughts: Should You Still Buy Diesel in 2025?

Despite the push toward electrification, diesel vehicles still make sense for many Australians. Whether you’re a tradie, a regional driver, or someone who wants efficient long-distance capability, the best diesel cars of 2025 offer excellent value.

If you want rugged capability, towing strength, or simply hate visiting the servo often, diesel is far from dead—it’s evolved to meet modern expectations.