Mannol 9929 Ester Engine Oil Additive 500 ml is a German engineered formula that provides advanced engine protection and performance. Powered by synthetic ester technology this additive magnetically binds to metal surfaces forming a strong protective oil film. The result is reduced friction and wear improved load tolerance and extended engine life. It enhances oil stability decreasing evaporation and boosting thermal resistance which supports longer oil change intervals. In low temperatures it improves cold start performance and lubricity. Ester molecules also clean and disperse deposits while rejuvenating worn seals to help prevent leaks. Compatible with all engine oils and suitable for petrol and diesel engines two stroke and four stroke this additive delivers smoother engine operation better fuel efficiency and reliable protection. Add 500 ml per 5 L of oil regularly to maintain optimal engine health and performance.