Liqui Moly Cera Tec oil additive 300 ml — ceramic wear protection, reduced friction & smoother performance

LIQUI MOLY Cera Tec is an oil additive that deposits ceramic micro-particles to reduce friction and protect engine components when mixed into motor oil.

Cera Tec is a high-tech ceramic wear protection additive formulated for use with all conventional motor oils. Designed for petrol and diesel engines as well as transmissions, pumps and compressors, the concentrate blends into engine oil and forms a low-friction layer that helps prevent direct metal-to-metal contact. A single 300 ml bottle treats up to 5 liters of oil and the manufacturer indicates protection may last up to 50,000 km under normal operating conditions. Not compatible with wet clutch systems.

How does Cera Tec reduce friction inside my engine?

When added to motor oil, ceramic compounds in Cera Tec form a microscopic protective coating on metal surfaces. This layer smooths contact points and lowers surface roughness, which reduces friction and wear during engine operation. The effect is purely mechanical and does not rely on altering oil viscosity.

• Deposits a ceramic film that minimizes metal-to-metal contact
• Works with existing oil—no changes to lubricant grade required
• Operates across a wide temperature range, from low to high heat

Will adding Cera Tec affect fuel economy or engine noise?

By decreasing friction between moving parts, Cera Tec can contribute to smoother running and potentially lower fuel consumption. Users commonly report quieter operation as component friction is reduced, though results vary with engine condition and driving habits. It’s not a fuel additive; it modifies surface interactions inside the oil-lubricated system.

• Can reduce internal friction for marginal fuel savings
• May lower mechanical noise by smoothing contact surfaces
• Benefits depend on existing wear and maintenance state of the engine

How is Cera Tec applied and how long will protection last?

Application is straightforward: add the 300 ml bottle to the engine oil; the product is self-mixing and distributes during normal operation. The dosing is calibrated for up to 5 liters of motor oil. LIQUI MOLY specifies protection lasting up to 50,000 km, though real-world duration depends on driving conditions and oil change intervals.

• Pour directly into the engine oil filler; no premixing needed
• One bottle covers engines with up to 5 liters of oil
• Designed to remain effective for extended intervals—manufacturer guidance up to 50,000 km

Are there compatibility limits or precautions I should know?

Cera Tec is formulated to mix with all commercially available motor oils and is compatible with common filter systems. It withstands extreme thermal and mechanical stresses without forming deposits. However, it must not be used in systems with wet clutches and always follow your vehicle manufacturer’s service recommendations.

• Safe with conventional and synthetic oils and standard filters
• Resistant to very high and very low temperatures
• Not suitable for wet clutch applications—avoid where specified

Who is this for? Cera Tec suits drivers and technicians seeking extended wear protection for petrol or diesel engines, owners of high-mileage vehicles looking to reduce friction-related wear, and workshops that want a straightforward oil-additive solution compatible with existing lubrication systems. Avoid using it in wet-clutch transmissions or where the vehicle maker explicitly prohibits aftermarket additives.

Product features:

• Mixable with all commercially available motor oils
• Stable under high thermal and dynamic loads
• No deposits; compatible with common filter systems
• Resists extreme temperature ranges