Castrol Cyltech 70 is a high-performance marine diesel engine cylinder lubricant designed for low-speed crosshead engines burning residual fuels with sulphur content between 0.1% and 3.5%. It provides excellent piston ring and cylinder liner wear control, maintains high levels of cleanliness, and offers good thermal and oxidative stability, even at optimized lubricant feed rates. Cyltech 70 has 'No Objection' status from major crosshead engine manufacturers.