lubricant specially designed for use with low-sulphur fuels. approved by MAN B&W and WARTSILA Sulzer designs. ports worldwide in 2005. waters from May 2005 following the ratification of MARPOL Annex VI. low-sulphur fuel. burning low-sulphur fuel. which can lead to a build-up of deposits, especially on the piston crown. just a question of diluting existing products. a build-up of deposit precursors. and corrosion.