GW ProMarine Series is a premium quality cylinder lubricant manufactured from high quality base oils and additives, designed for use in low speed crosshead diesel engines which burn residual fuel with high sulphur content. It is suitable for use in the new generation of highly rated fuel efficient, low speed marine diesel engines operating under high pressure and higher liner wall temperatures. GW ProMarine Series contains additives with good thermal stability and superior acid-corrosion protection. The high alkaline level in the lubricant provides superior ring and liner protection and cleanliness.