Best Gear Oil Additives of 2025

The WOL Gear Oil Additive is designed to enhance the performance of your transmission oil. Its MoS2 additive forms a strong lubricant film on all metal surfaces, significantly reducing friction and wear. This leads to lower temperature peaks, improving the overall reliability of your vehicle. You will also experience smoother gear shifts, making your driving experience more enjoyable and efficient. With this additive, you can expect better protection against dry running, ensuring that your vehicle operates at its best.

The STP Gearbox Oil offers several benefits for your vehicle. It effectively reduces friction and noise, enhancing your driving experience by making gear changes smoother. Additionally, it helps to minimise gearbox wear and corrosion, which can prolong the life of your gearbox. By removing harmful acids and deposits, this treatment ensures that the gearbox operates efficiently, giving you peace of mind and potentially saving you on costly repairs in the long run.

LIQUI MOLY Leak Stop is an effective oil additive designed to regenerate rubber and plastic seals in manual, auxiliary, and differential transmissions. This helps prevent oil leaks and stains under your vehicle, giving you peace of mind. It is suitable for one litre of gear oil, making it convenient to use. You can add it anytime, but for optimal results, it's best to include it during oil changes. This product is a simple solution to maintaining your vehicle’s transmission health.

The LIQUI MOLY Gear Oil Additive is designed for manual gearboxes, drive shafts, and differentials, providing a significant reduction in wear and lower temperature peaks. By adding this 150 ml additive to your gear oil, you can enhance the performance of up to 15 litres of transmission fluid. It is suitable for both mineral and synthetic gear oils, making it a versatile choice. This product is especially beneficial for professionals seeking to maintain their manual transmissions and differential gears effectively.

The Comma EP809005L Gear Oil is specifically formulated for synchromesh and constant mesh manual gearboxes, ensuring smooth operation and enhanced performance. It is also suitable for use in hypoid and spiral bevel rear axles, offering versatility across various applications. This oil can be used in auxiliary gearboxes and oil-lubricated CV joints, providing reliability and protection where it matters most. With a generous 5-litre size, you can easily keep your vehicles, including cars, vans, and trucks, well-lubricated and running efficiently.

The Liqui Moly Transmission Oil Additive is designed to enhance your vehicle's automatic transmission system. It effectively cleans and frees the oil circuit from harmful deposits, ensuring smoother gear shifting and prolonging the lifespan of your transmission. This product is suitable for all automatic transmissions, making it versatile for various vehicles. Simply add it to warmed-up transmission oil before changing the fluid, and enjoy a more efficient driving experience.

The XADO EX120 Additive offers efficient gear repair, protecting and regenerating worn surfaces in your manual transmission, transfer gears, and differentials. With its high-performance formula containing 20% more active ingredients, you can expect reduced wear and less noise and vibration during operation. It ensures smoother shifting, allowing you to enjoy a more comfortable driving experience. Additionally, the high-quality materials form a metal-ceramic coating on essential components, enhancing the longevity of your vehicle's transmission.

The XADO EX120 Additive is designed to enhance the performance of your gearbox and differential. It effectively eliminates cavities and scratches on operating surfaces, ensuring smoother operation. You'll also benefit from optimised contact patterns during gear engagements, which can lead to improved efficiency. This product provides significant fuel savings, particularly for all-wheel drive vehicles, helping you save money in the long run. Additionally, it reduces noise and vibrations by up to ten times, making your driving experience more comfortable.

The XADO Gear Additives are designed to combat wear and extend the life of your engine and manual transmission. You will benefit from restored engine compression and renewed surfaces, which improve overall performance. The product also provides active protection against overheating and overloading, ensuring your vehicle runs smoothly. Furthermore, it effectively restores the surfaces of transmission components, reducing noise and vibration for a more comfortable driving experience.

The Comma ATM5L Fluid is a mineral automatic transmission fluid designed to provide exceptional performance for various automatic transmissions, torque converters, and power steering systems. Being compatible with Dexron 11, it ensures smooth gear changes and enhances the reliability of your vehicle’s transmission. Using this fluid can help reduce wear and tear, prolonging the lifespan of your transmission components. With its premium formulation, you can trust that your vehicle will operate efficiently and effectively.