SHIRINDA SAE50 TBN70 is recommended for All 2-stroke engines, running on high sulfur residual fuels. Can be used alternately with lower BN products when using IMO 2020 compliant fuels. SHIRINDA SAE50 TBN70 has been designed to lubricate slow speed 2-stroke engines using residual fuels. Using conventional calcium carbonate chemistry, it efficiently neutralises sulfuric acid formed during combustion of high sulfur residual fuels. has high acid neutralisation capacity, ensuring excellent cylinder protection. Its high BN protect over long periods, from corrosion which help to maintain engine cleanliness. Reduces cylinder wear and scuffing, and can extend the length of time between engine overhauls.