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'4' in

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Engine Oil

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30% Club Credit Back*

Gulf Western

Gulf Western Extreme Diesel CK-4 Engine Oil - 15W-40 25 Litre

$214.99 ^{^}

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30% Club Credit Back on Selected
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Castrol

Castrol EDGE Engine Oil - 5W-30, A3/B4, 5 Litres

$94.99 ^{^}

(1005)

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Castrol

Castrol POWER 1 ULTIMATE 4T Motorcycle Oil 10W-40 4 Litre

$79.99 ^{^}

(55)

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Castrol

Castrol EDGE Engine Oil - 5W-30, A3/B4, 1 Litre

$32.99 ^{^}

(71)

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Castrol

Castrol POWER 1 ULTIMATE 4T Motorcycle Oil 5W-40 4 Litre

$89.99 ^{^}

(46)

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Castrol

Castrol RX Super Diesel CJ-4E9 Engine Oil - 15W-40, 20 Litres

$204.99 ^{^}

(70)

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Penrite

Penrite Small Engine 4 Stroke Engine Oil SAE 30 4 Litre

$59.99 ^{^}

(11)

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Penrite

MC-4 ST Full Synthetic Motorcycle Oil - 10W-40, 1 Litre

$32.99 ^{^}

(39)

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Penrite

Penrite MC-4ST Semi Synthetic Motorcycle Oil 10W-40 4 Litre

$84.99 ^{^}

(56)

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Penrite

Penrite MC-4 PAO Ester Motorcycle Oil - 10W-40, 4 Litre

$132.90 ^{^}

(115)

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Penrite

Penrite MC-4 Synthetic Motorcycle Oil - 10W-40 , 4 Litre

$114.99 ^{^}

(96)

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Penrite

Penrite MC-4 V Twin Motorcycle Oil - 20W-50, 4 Litre

$132.99 ^{^}

(63)

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Penrite

Penrite MC-4ST Semi Synthetic 15W-50 4 Litre

$76.99 ^{^}

(8)

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Penrite

Penrite MC-4 PAO Ester Motorcycle Oil - 15W-50, 4 Litre

$124.99 ^{^}

(46)

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Castrol

Castrol EDGE Engine Oil 5W-40 A3/B4, 1 Litre

$35.99 ^{^}

(23)

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Penrite

Penrite MC-4 PAO Ester Motorcycle Oil - 10W-40, 1 Litre

$41.99 ^{^}

(22)

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Clearance

SCA

SCA Full Synthetic Engine Oil 5W-40 A3/B4 1 Litre

$16.00 ^{^}

(17)

Not available for delivery

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Castrol

Castrol EDGE Engine Oil - 0W-40, A3/B4, 5 Litres

$114.99 ^{^}

(44)

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Liqui Moly

LIQUI MOLY Synth Street 4T Motorcycle Oil 10W-40 4 Litre

$114.99 ^{^}

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Castrol

Castrol POWER 1 ULTIMATE 4T Motorcycle Oil 10W-50 4 Litre

$112.99 ^{^}

(21)

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Liqui Moly

LIQUI MOLY Synth Street 4T Motorcycle Oil 10W-50 4 Litre

$94.99 ^{^}

(1)

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Penrite

Penrite MC-4 Semi Synthetic Motorcycle Oil - 10W-30, 4 Litre

$91.99 ^{^}

(26)

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Castrol

Castrol ACTIV 4T Motorcycle Oil 15W-50 4 Litre

$61.99 ^{^}

(77)

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SCA

SCA Full Synthetic Engine Oil 5W-40 A3/B4 1 Litre

$23.99 ^{^}

(2)

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Penrite

Penrite Enviro+ G4 FE Engine Oil - 0W-20 1 Litre

$42.99 ^{^}

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Castrol

Castrol EDGE Engine Oil - 0W-40, A3/B4, 1 Litre

$42.99 ^{^}

(8)

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Clearance

SCA

SCA Full Synthetic Engine Oil 5W-40 A3/B4 5 Litre

$42.00 ^{^}

(28)

Not available for delivery

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Castrol

Castrol RX Super 15W-40 CJ-4/E9 Diesel Engine Oil, 7 Litre

$114.99 ^{^}

(15)

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Castrol

Castrol RX Diesel 15W-40 CI-4/E7 Engine Oil, 20 Litre

$202.99 ^{^}

(85)

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Castrol

Castrol EDGE Engine Oil - 5W-30, A3/B4, 10 Litres

$189.99 ^{^}

(70)

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Liqui Moly

LIQUI MOLY Offroad 4T Motorcycle Oil 15W-50 4 Litre

$69.99 ^{^}

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Gulf Western

Gulf Western Outboard Oil - 2 Stroke, 4 Litre

$53.99 ^{^}

(104)

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Gulf Western

Gulf Western Top Dog CK-4 Engine Oil 15W-40 20 Litre

$189.99 ^{^}

(15)

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Clearance

SCA

SCA Mineral Small Engine Oil 4 Stroke SAE 30 5 Litre

$30.00 ^{^}

(43)

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Showing 1 - 34 of 79 Results

Discover Our SUPER Range of Engine Oils

Keep your vehicle running smoothly with the right engine oil. At Supercheap Auto, our comprehensive engine oil range covers everyday cars, high-performance vehicles, 4WDs, motorcycles, marine vessels, agricultural equipment and farm machinery, helping protect engines from wear, reduce deposits, and improve efficiency. From everyday commuting to demanding work conditions, our motor oils are designed for all drivers, tradies, farmers and boating enthusiasts. With options for fully synthetic, semi-synthetic, mineral, and specialist applications, you can find the right oil to suit your vehicle type, driving style, and environment, all in one place.

How to choose the right engine oil for your vehicle

Choosing the right engine oil starts with your vehicle’s make, model, and year, and considering driving conditions such as climate, distances, or towing. Check your manual for recommended viscosity, performance, and whether petrol, diesel, or turbo engines require specific oils. Consider high-mileage or older vehicles, which may benefit from specialised formulas. Choose fully synthetic, semi-synthetic, or mineral oils based on these factors, balancing protection, performance, and cost. For added convenience, enter your car rego into ‘My Garage’ to find compatible products for your specific vehicle. The right engine oil keeps engines protected, running efficiently, and helps extend service intervals for reliable performance. For further guidance, check our our handy DIY guide on how to choose engine oil

Fully synthetic engine oils for modern vehicles

Fully synthetic oils provide superior protection and performance for modern engines and high-performance vehicles. At Supercheap Auto, you’ll find fully synthetic engine oils from Penrite, Castrol, Mobil, Nulon, Gulf Western and Valvoline to reduce engine wear, maintain viscosity under extreme temperatures, and improve fuel efficiency. Designed for long service intervals, these oils resist breakdown and help engines run cleaner and smoother for longer. Ideal for daily driving, long-distance trips, and performance-focused vehicles, fully synthetic oils ensure engines remain well-lubricated under stress, delivering optimal protection for modern advanced engines.

Performance and value with semi-synthetic engine oils

Semi-synthetic oils combine synthetic and mineral base oils to provide reliable protection while maintaining cost efficiency. At Supercheap Auto, our range includes Nulon, Penrite, and Gulf Western semi-synthetic engine oils suitable for everyday cars, SUVs, light trucks and other vehicles. Semi-synthetic oils reduce deposits, improve high-temperature stability, and extend engine life compared to mineral oils alone. Perfect for commuting, weekend trips, or occasional long drives, these oils provide reliable lubrication and protection without premium pricing, making these a practical choice for most drivers seeking durable performance with moderate cost.

Mineral oils for older vehicles and classic engines

Mineral engine oils are typically ideal for older vehicles or engines with simpler designs. Our range of mineral oils, including Gulf Western, Penrite, Valvoline, Mobil and Nulon, delivers dependable lubrication, reduces engine wear, and maintains stable operating temperatures during everyday driving. Affordable and easy to access, mineral oils require more frequent changes than synthetic options but remain a practical solution for classic cars, low-rev engines, or standard daily drivers. These provide consistent performance, prevent engine damage under normal conditions, and keep engines protected and reliable without high costs.

Engine oils from trusted automotive brands

At Supercheap Auto, our engine oil range includes fully synthetic, semi-synthetic, and mineral options from trusted brands like Penrite, Nulon, Valvoline, Castrol, Mobil, Gulf Western, Petronas and Royal Purple. Designed to meet manufacturer specifications and support nearly all engine types, our range of oils help reduce wear, maintain efficiency, and protect performance across vehicles and vessels. Many of our engine oils are available in store, while others are available online through special order, making it easy to find the right oil.

Shop engine oils at Supercheap Auto

From fully synthetic to mineral formulations, our range is engineered to suit a wide variety of engines and operating conditions. We support almost everything from everyday cars, SUVs and 4WDs to motorcycles, agricultural equipment and marine applications, making it easy to choose the right oil for your needs. With trusted brands like Penrite, Gulf Western, Castrol, Mobil, Valvoline, and Nulon, you can protect engines, maintain performance, and improve efficiency. Our engine oils are formulated to meet manufacturer specifications, giving peace of mind for reliable operation in all conditions. Explore our range to keep your engine healthy, reliable, and ready for the road, water, track or farm.

Frequently Asked Questions - Engine Oils

Which engine oil do I choose for my car?

The right engine oil depends on your vehicle’s make, model, year, and engine type. Always check your owner’s manual for recommended viscosity and oil type. You can also enter your car rego into ‘My Garage’ to quickly find compatible engine oils, including the correct viscosity (e.g., 5W-30, 10W-40) and type (mineral, semi-synthetic, or fully synthetic).

Why is engine oil viscosity important?

Viscosity measures how thick or thin engine oil is at different temperatures. The right viscosity ensures the oil flows easily when cold, protects moving parts when hot, and maintains engine lubrication under all conditions. Choosing the correct viscosity prevents wear, improves fuel efficiency, and helps engines perform reliably in both summer heat and winter cold. Always follow the manufacturer’s recommended viscosity for optimal protection and long engine life.

What does 5W-30 engine oil mean?

5W-30 engine oil is designed to work well in both cold and hot conditions. The “5W” shows how the oil behaves when the engine is cold. It flows more easily than higher “W” oils, helping the engine start quickly in winter. The “30” indicates how thick the oil is at operating temperature, keeping moving parts protected while driving. This oil is ideal for everyday driving in cooler or moderate climates, providing smooth operation and reliable protection at all temperatures.

What does 10W-30 engine oil mean?

10W-30 engine oil is designed for engines that operate in warmer temperatures. The “10W” shows how the oil behaves when the engine is cold. It’s a bit thicker than lower “W” oils, so cold starts might feel slower. The “30” indicates how thick the oil is when the engine is hot, keeping moving parts lubricated during driving. 10W-30 engine oil is ideal for normal driving in moderate to warm climates and provides protection without needing a very thin cold-start oil.

What does 0W‑20 engine oil mean?

0W‑20 engine oil is designed for modern engines that prioritise fuel efficiency and smooth cold starts. The “0W” shows how the oil behaves when the engine is cold. It flows very easily at low temperatures, helping the engine start quickly and reducing wear during cold starts. The “20” indicates how thin the oil remains at operating temperature, allowing it to circulate efficiently while still providing essential protection. 0W-20 engine oil is commonly specified for many hybrid and newer petrol engines, supporting stop-start operation, improved fuel efficiency and reduced emissions when used as recommended by the manufacturer.

Can I use 10W-30 instead of 5W-30?

Using 10W-30 engine oil instead of 5W-30 is only safe if the vehicle manufacturer allows it. 10W-30 is thicker in cold temperatures, which can make starting the engine harder in winter or very cold conditions. Always follow the owner’s manual for recommended oil viscosity. Using the wrong cold-weather oil can reduce engine performance and fuel efficiency, especially in extreme temperatures, and may increase engine wear over time.

How do viscosity and oil type (mineral, semi, fully synthetic) relate?

Viscosity, shown by numbers like 5W-30 or 10W-30, indicates how thick the oil is when cold and hot. Oil type - mineral, semi-synthetic, or fully synthetic - shows how the oil protects the engine. The same viscosity can come in different types, for example, 5W-30 can be mineral, semi-synthetic, or fully synthetic. Viscosity affects flow and cold-start performance, while oil type affects protection, heat tolerance, and service life. Choosing the right combination keeps the engine running smoothly and reduces wear.

What's the difference between mineral and synthetic engine oil?

Mineral engine oil is made from refined crude oil and works well for older or simpler engines. Synthetic engine oil is chemically engineered to provide better engine protection, resist high temperatures, and last longer between oil changes. Synthetic oils also help reduce deposits and keep engines cleaner. Choosing the correct type of oil ensures proper lubrication, reduces engine wear, and maintains performance and efficiency.

What's the difference between fully synthetic and semi-synthetic engine oil?

Fully synthetic engine oil is engineered for maximum protection, high heat tolerance, and longer service life. Semi-synthetic oil blends mineral and synthetic oils, offering balanced protection at a lower cost. Fully synthetic works best for modern, high-performance, or turbo engines, while semi-synthetic suits everyday driving and older engines. Choosing the right type keeps the engine lubricated, reduces wear, and maintains performance and efficiency.

'4' in

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Engine Oil

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Gulf Western

Castrol

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Castrol

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Castrol

Penrite

Penrite

Penrite

Penrite

Penrite

Penrite

Penrite

Penrite

Castrol

Penrite

SCA

Castrol

Liqui Moly

Castrol

Liqui Moly

Penrite

Castrol

SCA

Penrite

Castrol

SCA

Castrol

Castrol

Castrol

Liqui Moly

Gulf Western

Gulf Western

SCA

Filter by Available In Store

Filter by Special Order

Discover Our SUPER Range of Engine Oils

How to choose the right engine oil for your vehicle

Fully synthetic engine oils for modern vehicles

Performance and value with semi-synthetic engine oils

Mineral oils for older vehicles and classic engines

Engine oils from trusted automotive brands

Shop engine oils at Supercheap Auto

Frequently Asked Questions - Engine Oils

Which engine oil do I choose for my car?

Why is engine oil viscosity important?

What does 5W-30 engine oil mean?

What does 10W-30 engine oil mean?

What does 0W‑20 engine oil mean?

Can I use 10W-30 instead of 5W-30?

How do viscosity and oil type (mineral, semi, fully synthetic) relate?

What's the difference between mineral and synthetic engine oil?

What's the difference between fully synthetic and semi-synthetic engine oil?