Best Engine Oil Additives of 2025

Wynn's Super Charge Oil works effectively to enhance the viscosity of lubricating oils, ensuring that they perform well even under heavy loads or high temperatures. By restoring compression and oil pressure, this additive helps reduce excessive oil consumption and minimise exhaust smoke, making your engine run cleaner. It also creates a solid lubricating film, which protects older engines from metal-to-metal contact, reducing wear. Additionally, you’ll appreciate how it quietens noisy engines while safeguarding against corrosion and oxidation.

LIQUI MOLY Cera Tec is a high-tech engine additive that enhances performance from the very first use. By using advanced ceramic compounds, it ensures smoother engine operation, which can lead to a longer lifespan for your engine. You will also benefit from lower fuel consumption and reduced emissions thanks to its ability to diminish friction. Adding it during oil changes is simple; just shake the 300 ml bottle and mix it with up to 5 litres of engine oil for lasting benefits of up to 50,000 km.

The Liqui Moly Hydraulic Tappet Additive is designed to enhance your engine's performance. It effectively prevents hydro tappet noise, ensuring a quieter and more comfortable ride. By cleaning lubrication holes and ducts in the oil circuit, this additive secures optimal performance of the hydro tappets. It's suitable for all petrol and diesel engines and can be mixed with any commercially available motor oils, offering great convenience. Just one 300 ml can is enough for engines with up to 6 litres of motor oil.

The LIQUI MOLY Oil Additive is designed to enhance engine performance by creating a robust lubricant film on metal surfaces. This reduces friction, ensuring your engine runs more smoothly and efficiently. It can be mixed with all types of commercially available motor oils, making it versatile for various applications. You can add 5% of the additive to your motor oil, or 2% for motorcycles with a wet clutch, providing you with flexibility in usage at any time.

The WYNNS Engine Oil Treatment is designed to enhance your engine's performance by extending its life. It reduces oxidation, friction, and wear, which can improve compression and the viscosity index of your oil. This means your engine runs smoother and more efficiently. Additionally, it helps to keep the oil system clean by reducing sludge and deposits, leading to lower oil consumption and fewer harmful exhaust emissions. You can also use it with all grades of engine oil, making it a versatile choice for various types of engines.

Lucas Oil Stabiliser is designed to enhance the performance of your engine oil. It can increase the oil life by at least 50%, which means fewer oil changes and savings on maintenance costs for you. Additionally, it reduces oil consumption, ensuring that your engine remains well-lubricated without wasting resources. The stabiliser also helps to eliminate dry starts, providing your engine with a smoother and safer start-up every time. This can significantly prolong the life of your engine, offering you peace of mind while driving.

The LIQUI MOLY Engine Flush is designed to thoroughly clean your engine from the inside. It effectively cleans and flushes out the oil systems of both petrol and diesel engines, ensuring optimal performance. One 500 ml can is sufficient for engines with up to 5 litres of oil, making it an efficient choice. By removing deposits from lubrication holes and oil screens, you can reduce engine noise and oil consumption, leading to a smoother and more economical driving experience.

The Slick-50 Engine Treatment is designed to protect your engine from friction and heat, particularly when under stress from towing or heavy loads. With its proprietary friction modifier, it creates a superior layer of lubrication, significantly reducing heat and ensuring smoother operation. The anti-wear agent forms a self-regenerating protective surface, preventing metal parts from grinding against each other. Additionally, a dispersant keeps your engine clean by stopping sludge and deposits from building up, helping to maintain optimal engine performance.

Wynn's Oil Leak Sealer is designed to effectively stop engine oil leaks and drips caused by the drying and shrinking of neoprene and rubber seals. You won’t need to disassemble your engine, as this additive restores the elasticity of these vital seals. It's suitable for all petrol, LPG, and diesel engines, making it a versatile choice for various vehicles and equipment. The product works with both mineral and synthetic oils, ensuring that it will not affect the viscosity or performance of your engine oil.

The LIQUI MOLY Oil Saver is a highly effective additive designed to regenerate rubber and plastic engine seals, helping to eliminate oil stains under your vehicle. By counteracting oil dilution, it aids in reducing engine noise and oil consumption, which can enhance the performance of your engine. Compatible with all petrol and diesel engines, this product is easy to use; simply add it to your motor oil at any time and let your engine warm up. Enjoy a smoother driving experience with this convenient solution.