Best Oil Additives of 2026

Last updated on 06/01/2026
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1
HYDRA VULCAN Heating oil additive, 500ml treats up to 2,500 litres, additive for kerosene, additive for heating oil, heating oil for home additive, additive for kerosene
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HYDRA VULCAN Heating oil additive, 500ml treats up to 2,500 litres, additive for kerosene, additive for heating oil, heating oil for home additive, additive for kerosene

HYDRA
Why we love it
  • Cleans injectors and burners.
  • Removes carbon and soot.
  • Reduces fuel consumption.
Main Highlights
  • ADDITIVE FOR HEATING OIL & KEROSENE… Contains heavy duty detergents designed for heating oils and kerosene used as boiler fuel, will rapidly clean injectors and burners down to molecular levels.
  • ADDITIVE FOR KEROSENE… Removes heavy build-up of carbon and soot deposits from all surfaces in the boiler fuel system.
  • HEATING OIL ADDITIVE… Stabilises fuel by dissolving sludge in fuel tanks and Hydra Vulcan's dispersants help prevent it from reforming.
  • MAKES PREMIUM KEROSENE… Turns normal heating oil kerosene / heating oil into premium kerosene / premium domestic heating oil this helps to reduce fuel consumption.
  • USE WITH ALL DOMESTIC HEATING OIL… For all boilers 500ml treats Up To 2,500 litre
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9.9
Exceptional
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9.9
Exceptional
HYDRA

HYDRA VULCAN Heating oil additive, 500ml treats up to 2,500 litres, additive for kerosene, additive for heating oil, heating oil for home additive, additive for kerosene

Why we love it
  • Cleans injectors and burners.
  • Removes carbon and soot.
  • Reduces fuel consumption.
Main Highlights
  • ADDITIVE FOR HEATING OIL & KEROSENE… Contains heavy duty detergents designed for heating oils and kerosene used as boiler fuel, will rapidly clean injectors and burners down to molecular levels.
  • ADDITIVE FOR KEROSENE… Removes heavy build-up of carbon and soot deposits from all surfaces in the boiler fuel system.
  • HEATING OIL ADDITIVE… Stabilises fuel by dissolving sludge in fuel tanks and Hydra Vulcan's dispersants help prevent it from reforming.
  • MAKES PREMIUM KEROSENE… Turns normal heating oil kerosene / heating oil into premium kerosene / premium domestic heating oil this helps to reduce fuel consumption.
  • USE WITH ALL DOMESTIC HEATING OIL… For all boilers 500ml treats Up To 2,500 litre
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Value for Money
2
LIQUI MOLY Cera Tec 3721 I Ceramic Wear & Tear Protection for Petrol & Diesel Engines I Smoother Engine Performance, Less Friction & Lower Fuel Consumption I Ceramic Additive 300 ml Pack of 1
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LIQUI MOLY Cera Tec 3721 I Ceramic Wear & Tear Protection for Petrol & Diesel Engines I Smoother Engine Performance, Less Friction & Lower Fuel Consumption I Ceramic Additive 300 ml Pack of 1

Liqui Moly
25% Off
Why we love it
  • Smoother engine performance guaranteed.
  • Certified effectiveness with TÜV Thüringen.
  • Extends engine's lifespan significantly.
Main Highlights
  • SMOOTHER ENGINE PERFORMANCE FROM VERY FIRST USE: An engine additive formulated with high-tech ceramic compounds, high thermal resilience. Additive ensures smoother-running engine, extending the engine’s lifespan. Can be used with manual & automatic transmissions. Not suitable for use with wet clutches.
  • LOWER FUEL CONSUMPTION and diminished emission of pollutants due to smoother engine operation.
  • EASY TO ADD DURING OIL CHANGES: The 300 ml bottle is sufficient for up to 5 liters of engine oil. Shake well before use and add to fresh oil. Can be mixed with all gear & engine oils on the market. Long-lasting performance, up to 50,000 km.
  • CERTIFIED EFFECTIVENESS proven by TÜV Thüringen: Chemical components in Cera Tec smooth out rough surfaces, the ceramic particles fill in uneven surface imperfections. Prevents direct contact of all metal parts, reducing friction and wear & tear. Turbo & Cat tested.
  • EVERYTHING THAT DRIVES WORKS BETTER WITH LIQUI MOLY: We manufacture over 4,000 products: engine oils, additives, vehicle care, chemical servicing and repair, adhesives and sealing products. Our products are currently distributed to over 150 countries worldwide. They are popular everywhere, ensuring a superior driving experience and improved engine performance.
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9.7
Exceptional
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9.7
Exceptional
Liqui Moly

LIQUI MOLY Cera Tec 3721 I Ceramic Wear & Tear Protection for Petrol & Diesel Engines I Smoother Engine Performance, Less Friction & Lower Fuel Consumption I Ceramic Additive 300 ml Pack of 1

25% Off
Why we love it
  • Smoother engine performance guaranteed.
  • Certified effectiveness with TÜV Thüringen.
  • Extends engine's lifespan significantly.
Main Highlights
  • SMOOTHER ENGINE PERFORMANCE FROM VERY FIRST USE: An engine additive formulated with high-tech ceramic compounds, high thermal resilience. Additive ensures smoother-running engine, extending the engine’s lifespan. Can be used with manual & automatic transmissions. Not suitable for use with wet clutches.
  • LOWER FUEL CONSUMPTION and diminished emission of pollutants due to smoother engine operation.
  • EASY TO ADD DURING OIL CHANGES: The 300 ml bottle is sufficient for up to 5 liters of engine oil. Shake well before use and add to fresh oil. Can be mixed with all gear & engine oils on the market. Long-lasting performance, up to 50,000 km.
  • CERTIFIED EFFECTIVENESS proven by TÜV Thüringen: Chemical components in Cera Tec smooth out rough surfaces, the ceramic particles fill in uneven surface imperfections. Prevents direct contact of all metal parts, reducing friction and wear & tear. Turbo & Cat tested.
  • EVERYTHING THAT DRIVES WORKS BETTER WITH LIQUI MOLY: We manufacture over 4,000 products: engine oils, additives, vehicle care, chemical servicing and repair, adhesives and sealing products. Our products are currently distributed to over 150 countries worldwide. They are popular everywhere, ensuring a superior driving experience and improved engine performance.
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3
LIQUI MOLY Pro-Line Gear Oil Additive | 150 ml | Oil additive | SKU: 5198
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LIQUI MOLY Pro-Line Gear Oil Additive | 150 ml | Oil additive | SKU: 5198

Liqui Moly
15% Off
Why we love it
  • Reduces wear significantly.
  • Decreases temperature peaks.
  • Compatible with various gear oils.
Main Highlights
  • For all manual gearboxes, drive shafts and differentials.
  • Do not use in fully-automatic transmissions and transmissions with clutches that run in oil baths.
  • 150 ml, enough for around 15 L of transmission fluid
  • For professionals only!
  • An additive specifically developed for manual transmissions and differential gears. It significantly reduces wear and decreases temperature peaks.
  • Exceptionally well-suited for use in manual, transfer and differential transmissions. Also suited for use in mechanical steering systems.
  • Add Pro-Line Gear Oil Additive to the gear oil - mixing takes place automatically during operation. The product is suitable for both mineral and synthetic-based gear oils. One tube is sufficient for up to 15 liters of gear oil.
  • In problematic cases, we recommend adding a 2 % dosage to the gear oil.
  • Note: Not suited for use in motorcycles with wet clutches, fully automatic transmissions and self-locking differential transmissions!
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9.5
Superb
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9.5
Superb
Liqui Moly

LIQUI MOLY Pro-Line Gear Oil Additive | 150 ml | Oil additive | SKU: 5198

15% Off
Why we love it
  • Reduces wear significantly.
  • Decreases temperature peaks.
  • Compatible with various gear oils.
Main Highlights
  • For all manual gearboxes, drive shafts and differentials.
  • Do not use in fully-automatic transmissions and transmissions with clutches that run in oil baths.
  • 150 ml, enough for around 15 L of transmission fluid
  • For professionals only!
  • An additive specifically developed for manual transmissions and differential gears. It significantly reduces wear and decreases temperature peaks.
  • Exceptionally well-suited for use in manual, transfer and differential transmissions. Also suited for use in mechanical steering systems.
  • Add Pro-Line Gear Oil Additive to the gear oil - mixing takes place automatically during operation. The product is suitable for both mineral and synthetic-based gear oils. One tube is sufficient for up to 15 liters of gear oil.
  • In problematic cases, we recommend adding a 2 % dosage to the gear oil.
  • Note: Not suited for use in motorcycles with wet clutches, fully automatic transmissions and self-locking differential transmissions!
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4
LIQUI MOLY Pro-Line Oil Loss Stop | 1 L | Oil additive | SKU: 5182
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LIQUI MOLY Pro-Line Oil Loss Stop | 1 L | Oil additive | SKU: 5182

Liqui Moly
Why we love it
  • Reduces oil consumption significantly.
  • Regenerates rubber and plastic seals.
  • Suitable for all engines.
Main Highlights
  • Suitable for all petrol and diesel engines with or without a diesel particulate filter (DPF).
  • Can be mixed with all commercial engine oils.
  • 1 L, enough for around 15 L of engine oil Sealing action after 600 - 800 km
  • For professionals only!
  • Oil Loss Stop regenerates rubber and plastic engine seals (e.g., shaft seals and valve stem seals). Reduces oil consumption through piston rings (due to its uniform viscosity) and through valve guides (by regenerating the seals).
  • Suitable for all gasoline and diesel engines.
  • Contents of the can (1 liter) are sufficient for up to 15 liters of motor oil. The product can be added at any time. After adding, run the engine until warm or drive the vehicle.
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9.3
Superb
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9.3
Superb
Liqui Moly

LIQUI MOLY Pro-Line Oil Loss Stop | 1 L | Oil additive | SKU: 5182

Why we love it
  • Reduces oil consumption significantly.
  • Regenerates rubber and plastic seals.
  • Suitable for all engines.
Main Highlights
  • Suitable for all petrol and diesel engines with or without a diesel particulate filter (DPF).
  • Can be mixed with all commercial engine oils.
  • 1 L, enough for around 15 L of engine oil Sealing action after 600 - 800 km
  • For professionals only!
  • Oil Loss Stop regenerates rubber and plastic engine seals (e.g., shaft seals and valve stem seals). Reduces oil consumption through piston rings (due to its uniform viscosity) and through valve guides (by regenerating the seals).
  • Suitable for all gasoline and diesel engines.
  • Contents of the can (1 liter) are sufficient for up to 15 liters of motor oil. The product can be added at any time. After adding, run the engine until warm or drive the vehicle.
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5
Lucas Oil 10001 Heavy Duty Oil Stabiliser, 946 ml
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Lucas Oil 10001 Heavy Duty Oil Stabiliser, 946 ml

Lucas Oil
18% Off
Why we love it
  • Increases oil life significantly.
  • Minimizes oil consumption.
  • Prevents dry starts.
Main Highlights
  • Increases oil life at least 50% longer
  • Reduces oil consumption
  • Eliminates dry starts
Show More
9.1
Superb
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9.1
Superb
Lucas Oil

Lucas Oil 10001 Heavy Duty Oil Stabiliser, 946 ml

18% Off
Why we love it
  • Increases oil life significantly.
  • Minimizes oil consumption.
  • Prevents dry starts.
Main Highlights
  • Increases oil life at least 50% longer
  • Reduces oil consumption
  • Eliminates dry starts
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6
MANNOL Ceramo Ester Engine Oil Additive 250ml
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MANNOL Ceramo Ester Engine Oil Additive 250ml

MANNOL
Why we love it
  • Extreme pressure resistance enhances performance.
  • Reduces wear and increases longevity.
  • Boosts cold starts and stability.
Main Highlights
  • The additive gives the oil the following properties:
  • Prevents dry friction, Reduces evaporation, decreases CO2 emissions and prolongs oil life
  • Improves the thermal-oxidative stability, which increases the resistance to ageing and degradation
  • Compatible with catalytic converters, all types of turbochargers and all injection systems including common rail
  • Application: Shake and add to the oil at a ratio of 250 ml per 5L
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8.9
Excellent
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8.9
Excellent
MANNOL

MANNOL Ceramo Ester Engine Oil Additive 250ml

Why we love it
  • Extreme pressure resistance enhances performance.
  • Reduces wear and increases longevity.
  • Boosts cold starts and stability.
Main Highlights
  • The additive gives the oil the following properties:
  • Prevents dry friction, Reduces evaporation, decreases CO2 emissions and prolongs oil life
  • Improves the thermal-oxidative stability, which increases the resistance to ageing and degradation
  • Compatible with catalytic converters, all types of turbochargers and all injection systems including common rail
  • Application: Shake and add to the oil at a ratio of 250 ml per 5L
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7
LIQUI MOLY Oil Additive | 200 ml | Oil additive | SKU: 7178

LIQUI MOLY Oil Additive | 200 ml | Oil additive | SKU: 7178

Liqui Moly
Why we love it
  • Reduces friction effectively.
  • Enhances engine performance.
  • Compatible with all oils.
Main Highlights
  • The MoS2 low-viscosity engine oil creates a heavy-duty lubricant film on all frictioning and sliding metal surfaces; It reduces friction,gooding the aggregates run more smoothly
  • Added to the lubricating oils of engines, compressors, pumps and especially motor vehicle engines (gasoline and diesel); Mixable with all commercially available motor oils
  • Add 5 % (50 ml per litre of oil) of Oil Additive to motor oil; in motorcycles with wet clutch, add 2 % (20 ml per litre of oil); Can be added to motor oil at any time
  • Model number: 7178
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8.7
Excellent
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8.7
Excellent
Liqui Moly

LIQUI MOLY Oil Additive | 200 ml | Oil additive | SKU: 7178

Why we love it
  • Reduces friction effectively.
  • Enhances engine performance.
  • Compatible with all oils.
Main Highlights
  • The MoS2 low-viscosity engine oil creates a heavy-duty lubricant film on all frictioning and sliding metal surfaces; It reduces friction,gooding the aggregates run more smoothly
  • Added to the lubricating oils of engines, compressors, pumps and especially motor vehicle engines (gasoline and diesel); Mixable with all commercially available motor oils
  • Add 5 % (50 ml per litre of oil) of Oil Additive to motor oil; in motorcycles with wet clutch, add 2 % (20 ml per litre of oil); Can be added to motor oil at any time
  • Model number: 7178
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8
LIQUI MOLY Motor Oil Saver | 300 ml | Oil additive | SKU: 1802
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LIQUI MOLY Motor Oil Saver | 300 ml | Oil additive | SKU: 1802

Liqui Moly
26% Off
Why we love it
  • Reduces engine noise effectively.
  • Suitable for all engines.
  • Works within 600-800 km.
Main Highlights
  • Regenerates rubber and plastic engine seals such as shaft seals and valve stem seals and prevents oil stains under the vehicle. Counteracts oil dilution. Reduces engine noise and oil consumption through piston rings and valve guides.
  • For all gasoline and diesel engines. Compatible with all commercially available motor oils.
  • One 300 ml can of Oil Leak Stop is sufficient up to 5 liters of motor oil. The product can be added at any time. After adding, run the engine until warm. Sealing first takes effect after about 600 - 800 km.
  • Not suitable for use in motorcycles with wet clutches!
Show More
8.7
Excellent
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8.7
Excellent
Liqui Moly

LIQUI MOLY Motor Oil Saver | 300 ml | Oil additive | SKU: 1802

26% Off
Why we love it
  • Reduces engine noise effectively.
  • Suitable for all engines.
  • Works within 600-800 km.
Main Highlights
  • Regenerates rubber and plastic engine seals such as shaft seals and valve stem seals and prevents oil stains under the vehicle. Counteracts oil dilution. Reduces engine noise and oil consumption through piston rings and valve guides.
  • For all gasoline and diesel engines. Compatible with all commercially available motor oils.
  • One 300 ml can of Oil Leak Stop is sufficient up to 5 liters of motor oil. The product can be added at any time. After adding, run the engine until warm. Sealing first takes effect after about 600 - 800 km.
  • Not suitable for use in motorcycles with wet clutches!
Show More
9
WYNNS Formula Gold Engine Oil Treatment - Improves Compression & Reduces Wear - Enhances Oil Viscosity & Cleans Engine Internally - 500ml
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WYNNS Formula Gold Engine Oil Treatment - Improves Compression & Reduces Wear - Enhances Oil Viscosity & Cleans Engine Internally - 500ml

Wynn's
3% Off
Why we love it
  • Extends engine life efficiently.
  • Reduces harmful exhaust emissions.
  • Compatible with all engine oils.
Main Highlights
  • ✅ DOUBLE ACTION FORMULA FOR ENGINE OPTIMIZATION: Formulated as a fully oil-soluble chemical treatment, this product delivers a powerful double action for engine efficiency. First, it improves engine compression, which supports consistent power delivery and enhanced performance. Second, it actively reduces wear on internal engine components, contributing to long-term reliability. By targeting two essential engine functions simultaneously, the treatment not only stabilises mechanical operation but also supports smoother running under varying driving conditions.
  • ✅ ENHANCED OIL PERFORMANCE AND VISCOSITY CONTROL: Designed to reinforce the oil's protective properties, this treatment significantly improves the oil’s viscosity index, enabling it to perform better across a wider range of temperatures. It delays the premature thickening that can affect fresh oil, ensuring the lubricant retains its flow characteristics even in extreme conditions. The formulation enhances the oil’s structural integrity, promoting longer service intervals and consistent lubrication performance.
  • ✅ SLUDGE CONTROL AND SYSTEM CLEANLINESS: By actively reducing the formation of sludge and harmful deposits, this chemical treatment helps maintain a clean and efficient oil system. Sludge build-up can clog oil passages, impair circulation, and reduce engine efficiency. The advanced formulation dissolves existing contaminants and prevents the accumulation of new residues, safeguarding the engine’s internal components from abrasive particles and sticky deposits. Regular use promotes better oil flow, reduces frictional losses, and ensures that oil filters and galleries remain clean and unblocked.
  • ✅ LOWER EMISSIONS AND REDUCED OIL CONSUMPTION: The treatment contributes to reduced oil consumption and minimises the release of harmful exhaust emissions. By enhancing oil stability and improving engine sealing through better compression, less oil is burned during engine operation. This directly leads to fewer particulates and hydrocarbons being emitted into the atmosphere. Lower oil consumption also means fewer top-ups are necessary, resulting in better cost-efficiency and environmental sustainability. The product’s role in keeping internal parts clean and operating at peak efficiency further ensures optimal combustion and reduced emissions.
  • ✅ UNIVERSAL COMPATIBILITY AND SAFE FORMULATION: This treatment is free from solid particles, ensuring it will not damage engine components or catalytic converters. Its fully oil-soluble nature allows for seamless blending with all grades of engine oil, including synthetic, semi-synthetic, and mineral-based types. It is suitable for both regular and low SAPS (sulphated ash, phosphorus, and sulphur) applications, making it an ideal choice for a wide variety of engine types. Compatible with petrol, diesel, LPG, and hybrid engines, this product is designed for flexibility and convenience. A single 500ml bottle is effective for oil volumes ranging from 4 to 6 litres.
Show More
8.7
Excellent
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8.7
Excellent
Wynn's

WYNNS Formula Gold Engine Oil Treatment - Improves Compression & Reduces Wear - Enhances Oil Viscosity & Cleans Engine Internally - 500ml

3% Off
Why we love it
  • Extends engine life efficiently.
  • Reduces harmful exhaust emissions.
  • Compatible with all engine oils.
Main Highlights
  • ✅ DOUBLE ACTION FORMULA FOR ENGINE OPTIMIZATION: Formulated as a fully oil-soluble chemical treatment, this product delivers a powerful double action for engine efficiency. First, it improves engine compression, which supports consistent power delivery and enhanced performance. Second, it actively reduces wear on internal engine components, contributing to long-term reliability. By targeting two essential engine functions simultaneously, the treatment not only stabilises mechanical operation but also supports smoother running under varying driving conditions.
  • ✅ ENHANCED OIL PERFORMANCE AND VISCOSITY CONTROL: Designed to reinforce the oil's protective properties, this treatment significantly improves the oil’s viscosity index, enabling it to perform better across a wider range of temperatures. It delays the premature thickening that can affect fresh oil, ensuring the lubricant retains its flow characteristics even in extreme conditions. The formulation enhances the oil’s structural integrity, promoting longer service intervals and consistent lubrication performance.
  • ✅ SLUDGE CONTROL AND SYSTEM CLEANLINESS: By actively reducing the formation of sludge and harmful deposits, this chemical treatment helps maintain a clean and efficient oil system. Sludge build-up can clog oil passages, impair circulation, and reduce engine efficiency. The advanced formulation dissolves existing contaminants and prevents the accumulation of new residues, safeguarding the engine’s internal components from abrasive particles and sticky deposits. Regular use promotes better oil flow, reduces frictional losses, and ensures that oil filters and galleries remain clean and unblocked.
  • ✅ LOWER EMISSIONS AND REDUCED OIL CONSUMPTION: The treatment contributes to reduced oil consumption and minimises the release of harmful exhaust emissions. By enhancing oil stability and improving engine sealing through better compression, less oil is burned during engine operation. This directly leads to fewer particulates and hydrocarbons being emitted into the atmosphere. Lower oil consumption also means fewer top-ups are necessary, resulting in better cost-efficiency and environmental sustainability. The product’s role in keeping internal parts clean and operating at peak efficiency further ensures optimal combustion and reduced emissions.
  • ✅ UNIVERSAL COMPATIBILITY AND SAFE FORMULATION: This treatment is free from solid particles, ensuring it will not damage engine components or catalytic converters. Its fully oil-soluble nature allows for seamless blending with all grades of engine oil, including synthetic, semi-synthetic, and mineral-based types. It is suitable for both regular and low SAPS (sulphated ash, phosphorus, and sulphur) applications, making it an ideal choice for a wide variety of engine types. Compatible with petrol, diesel, LPG, and hybrid engines, this product is designed for flexibility and convenience. A single 500ml bottle is effective for oil volumes ranging from 4 to 6 litres.
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10
LIQUI MOLY Oil Additive | 300 ml | Oil additive | SKU: 2591

LIQUI MOLY Oil Additive | 300 ml | Oil additive | SKU: 2591

Liqui Moly
Why we love it
  • Fits all friction surfaces.
  • Ideal for furniture.
  • Compact and easily stored.
Main Highlights
  • Item Package Length: 5.5cm
  • Item Package Width: 5.5cm
  • Item Package Height: 18.5cm
Show More
8.7
Excellent
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8.7
Excellent
Liqui Moly

LIQUI MOLY Oil Additive | 300 ml | Oil additive | SKU: 2591

Why we love it
  • Fits all friction surfaces.
  • Ideal for furniture.
  • Compact and easily stored.
Main Highlights
  • Item Package Length: 5.5cm
  • Item Package Width: 5.5cm
  • Item Package Height: 18.5cm
Show More

We scanned 538 products

We reviewed these offers relevant to the Oil Additives within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like HYDRA, Liqui Moly, Lucas Oil, MANNOL, Wynn's, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.
For the best Oil Additives in the market, we considered we took a deep dive into 2691 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that: