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Engine Additive Comparison - August 2025

7 Best Engine Additive In the UK

Last Updated - 02/08/2025

Advertising Disclosure

Our Score

To Amazon

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Model

LIQUI MOLY Pro-Line Engine Flush | 500 ml | Oil additive | SKU: 2427

Model

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

Model

Wynn's Super Charge Oil Treatment - Enhances Viscosity - Restores Compression & Pressure - Reduces Oil Consumption & Smoke Emissions - Prevents Metal Contact & Engine Wear - 425ml

Model

Archoil AR6900-D Max Advanced Diesel Additive Concentrate, 1L Treats 1,000L of Fuel, Diesel Fuel Injector Cleaner, DPF Filter EGR Valve Turbo Cleaner, Super Diesel Converter. (1Litre)

Model

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

Model

Ceramizer CS - Ceramic Revitalizant Paste For 4 Stroke Engines - Additive For All Engine Oils - Regenerator Of Surfaces Subjected To Friction - Innovation Formula In Small Syringe

Model

Liqui Moly 2770 - Engine Oil Additive

Brand

Liqui Moly

Brand

Liqui Moly

Brand

Wynn's

Brand

Archoil

Brand

Liqui Moly

Brand

Ceramizer

Brand

Liqui Moly

Reviews

17,330 reviews

Reviews

44,874 reviews

Reviews

2,442 reviews

Reviews

1,472 reviews

Reviews

3,910 reviews

Reviews

46 reviews

Reviews

9,840 reviews

Features

Worth the money

9.6

Worth the money

9.3

Worth the money

9.9

Worth the money

9.4

Worth the money

9.6

Worth the money

9.1

Worth the money

8.1

Distance

9.8

Distance

9.3

Distance

9.9

Distance

9.3

Distance

9.4

Distance

8.9

Distance

7.7

Simple to use

9.9

Simple to use

9.3

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Our Top 3 Picks

Here are the top 3 recommended products with more information to help you find the right product for you

9.7
1

Liqui Moly
34% Off

LIQUI MOLY Pro-Line Engine Flush | 500 ml | Oil additive | SKU: 2427

9.9 Simple to use

9.8 distance

9.6 worth the money

Why we love it

Cleans engine internally effectively.

Reduces engine noise significantly.

Improves overall engine performance.
Main highlights

Removes deposits from lubrication holes, oil screens, piston ring zone etc.
Reduces engine noise and oil consumption
One 500 ml can is sufficient for up to 5 litres of oil
Improves compression
Cleans the engine from the inside
Cleaning and flushing out the oil systems of petrol and diesel engines
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9.6
2

Liqui Moly
10% Off

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

9.3 worth the money

9.3 distance

9.3 Simple to use

Why we love it

Extends engine lifespan effectively.

Reduces fuel consumption noticeably.

Compatible with most engine oils.
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.
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.
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.
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9.4
3

Wynn's
Wynn's Super Charge Oil Treatment - Enhances Viscosity - Restores Compression & Pressure - Reduces Oil Consumption & Smoke Emissions - Prevents Metal Contact & Engine Wear - 425ml

9.9 worth the money

9.9 distance

9.9 Simple to use

Why we love it

Boosts engine performance and longevity.

Reduces oil consumption significantly.

Ideal for older engines with high wear.
Main highlights

RESTORES COMPRESSION AND OIL PRESSURE FOR OPTIMAL PERFORMANCE: Over time, engine wear can lead to reduced compression and lower oil pressure, causing inefficiencies and potential damage. This formulation is designed to restore lost compression, helping to maintain the power and efficiency of the engine. By improving oil pressure, it ensures proper circulation of lubricating oil, reducing internal friction and preventing dry starts. This is particularly beneficial for engines that experience increased oil consumption, as it helps maintain stability and efficiency.
REDUCES EXCESSIVE OIL CONSUMPTION AND MINIMISES SMOKE EMISSIONS: Excessive oil consumption is a common issue in older engines or those subjected to high levels of stress. This specially formulated additive reduces the rate at which oil is burned, leading to lower oil consumption and fewer top-ups between oil changes. Additionally, it helps minimise the formation of exhaust smoke caused by oil burning, resulting in cleaner emissions. Reducing smoke output not only benefits the environment but also enhances the overall efficiency of the engine.
QUIETENS NOISY ENGINES AND PROTECTS AGAINST CORROSION AND WEAR: Engine noise is often a result of insufficient lubrication and increased friction between moving parts. This advanced formulation reduces mechanical noise by ensuring that all engine components are adequately lubricated, leading to smoother and quieter operation. Additionally, it offers strong protection against corrosion, oxidation, rust, and wear, shielding the engine from harmful contaminants and moisture. By forming a protective layer on metal surfaces, it prevents rust formation and oxidation, preserving engine performance over time.
IMPROVES THE VISCOSITY INDEX AND STRENGTHENS OIL FILM: Enhancing the viscosity index of lubricating oils is essential to ensure consistent engine performance under varying temperatures. This formulation effectively stabilises the oil’s viscosity, allowing it to maintain its protective properties even under extreme heat or heavy load conditions. By strengthening the oil film, it creates a durable barrier between moving parts, reducing friction and wear. The ability to retain its viscosity under high-temperature, high-shear environments ensures optimal lubrication, prolonging the life of the engine components.
ENSURES SOLID LUBRICATING FILM AND PREVENTS METAL-TO-METAL CONTACT: Maintaining a strong lubricating film is crucial to protect the engine’s moving components from wear and damage. This treatment ensures a solid oil barrier that remains effective even under high load and extreme temperatures. By reducing direct metal-to-metal contact, it prevents surface degradation, friction-induced heat buildup, and premature part failure. The reinforced oil film provides superior lubrication across all critical engine components, minimising the risks of mechanical breakdown.
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Our ranking system

The TopChoice.co.uk Team selects top-of-the-line items from a wide selection and conducts rigorous evaluations on almost all the products available on the internet. We rank each product based on how well it matches our criteria.
We can ensure that the product is well-tested with the help of our expertise, experts, and artificial intelligence technology. TopChoice.co.uk requires consistent care for the products we review, ensuring that our assessments are always accurate and up to date.

Features

Our team of experts analyzes key attributes, capabilities, significance, and many more depending on the type of product to determine its effectiveness.

Consumer Reviews

We ensure an evaluation of the ratings using references all over the internet for each product. With the help of our AI technology and professional review teams, we give weight to the worth of individual user experiences.

Popularity

Popularity is an important criterion in choosing a product. Several factors contribute to the popularity of the products on our site, including prestige, relevance, reputation, news, and more.

Value for money

TopChoice.co.uk compares product attributes to price, examines tech specs, ratings and reviews, and more.

When compared to other criteria, does the pricing seem reasonable? In order to provide genuine value for money, our team must answer that question with advanced calculations.

7 Best Engine Additive In the UK

Our Score

To Amazon

Model

Brand

Reviews

Features

Worth the money

Distance

Simple to use

Tech Specs

manufacturer part number

item weight

product dimensions

customer reviews

model

Available On

Our Top 3 Picks

LIQUI MOLY Pro-Line Engine Flush | 500 ml | Oil additive | SKU: 2427

Why we love it

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

Why we love it

Wynn's Super Charge Oil Treatment - Enhances Viscosity - Restores Compression & Pressure - Reduces Oil Consumption & Smoke Emissions - Prevents Metal Contact & Engine Wear - 425ml

Why we love it

Our ranking system

Features

Consumer Reviews

Popularity

Value for money

Value for money

Related deals you might like for engine additive

STP Synthetic Oil Treatment for Petrol and Diesel Engines 300ml, Protects Against Engine Wear, Reduces Pistol Deposit and Oil Consumption, Mechanical Car Cleaning Products, Made in the UK

Slick-50 61399750 Engine Treatment 750ml

Wynn's Diesel Power 7 Complete Action Fuel Additive Optimises Engine Performance 1L

7 Best Engine Additive In the UK

engine additive comparison

Our Score

To Amazon

Model

Brand

Reviews

Features

Worth the money

Distance

Simple to use

Tech Specs

manufacturer part number

item weight

product dimensions

customer reviews

model

Available On

Our Top 3 Picks

LIQUI MOLY Pro-Line Engine Flush | 500 ml | Oil additive | SKU: 2427

Why we love it

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

Why we love it

Wynn's Super Charge Oil Treatment - Enhances Viscosity - Restores Compression & Pressure - Reduces Oil Consumption & Smoke Emissions - Prevents Metal Contact & Engine Wear - 425ml

Why we love it

Our ranking system

Features

Consumer Reviews

Popularity

Value for money

Value for money

Related deals you might like for engine additive

STP Synthetic Oil Treatment for Petrol and Diesel Engines 300ml, Protects Against Engine Wear, Reduces Pistol Deposit and Oil Consumption, Mechanical Car Cleaning Products, Made in the UK

Slick-50 61399750 Engine Treatment 750ml

Wynn's Diesel Power 7 Complete Action Fuel Additive Optimises Engine Performance 1L

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