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

LIQUI MOLY CERA TEC is a 300 ml ceramic-based oil additive that reduces friction and wear in petrol and diesel engines, improving smoothness and helping lower fuel use.

CERA TEC is a concentrated ceramic wear protection formula designed to be added directly to engine oil. Its ceramic compounds form a durable, low-friction boundary layer that helps prevent metal-to-metal contact under extreme temperatures and loads. Compatible with a wide range of commercially available motor oils, CERA TEC is self-mixing, leaves no deposits, and is intended for engines, gearboxes, pumps and compressors. One 300 ml bottle treats up to 5 liters of oil and provides protection for up to 50,000 km; it should not be used with wet clutch systems.

How does CERA TEC reduce engine wear and friction?

CERA TEC’s ceramic particles create a thin, resilient tribological layer on metal surfaces, which lowers friction and reduces direct contact between moving parts. That protective film helps the engine run smoother and can slow the progression of wear-prone areas without altering the base oil’s properties.

• Forms a ceramic boundary layer on rubbing surfaces
• Minimises metal-to-metal contact under pressure
• Resists thermal and chemical stress at high temperatures

Will this work with my petrol or diesel vehicle?

CERA TEC is formulated for use with both petrol and diesel engines and is mixable with standard commercial motor oils. It’s suitable for a broad range of engine types but avoid using it in applications with wet clutches where compatibility is not guaranteed.

• Compatible with most conventional and synthetic engine oils
• Safe for turbocharged and high-performance engines (unless wet clutch present)
• Also recommended for transmissions, pumps and compressors

How do I add CERA TEC and what coverage can I expect?

Pour the 300 ml bottle into the engine oil; the formula is self-mixing so no pre-dilution is required. One bottle treats up to 5 liters of oil and the protective effect lasts up to approximately 50,000 km, depending on driving conditions and maintenance intervals.

• Dosage: one 300 ml bottle per 5 liters of oil
• Mixes automatically into the oil during normal operation
• Protection duration depends on usage but is rated up to 50,000 km

Are there any safety or compatibility considerations?

CERA TEC is designed to be deposit-free and compatible with common filter systems and seals, and it remains stable under long-term thermal and dynamic loads. Do not use in systems requiring wet-clutch friction characteristics, and always follow vehicle manufacturer recommendations when adding any oil additive.

• No deposit formation; filter-compatible
• Stable at very high and low temperatures
• Not suitable for wet-clutch transmissions

Who is this for: CERA TEC is aimed at vehicle owners and fleet managers who want additional wear protection and smoother engine operation without changing oil chemistry. It suits drivers of petrol and diesel cars, performance and turbocharged engines, as well as workshop professionals looking to extend component life in engines, gearboxes, pumps and compressors—provided the system does not use a wet clutch. Use as part of routine oil service intervals for best results.