GulfSea Power and GulSea Power MDO series are trunk piston engine oil designed for use in medium speed diesel .engines operating on distillate fuels The modern additive technology use in this oil provides superior engine cleanliness & protection. This oil is available in SAE 30 & SAE 40 viscosity grades with a TBN of 12 & 15 & 30.Each grade has got a suffix of 4 digits in which the first two digits indicate the SAE grade)e.g. 30 indicate SAE 30 and 40 indicate SAE 40( and the last two digits indicate the TBN.These oils exhibit a high degree of water tolerance and meet .the performance requirements of API CF