Page 73: of Maritime Reporter Magazine (December 1997)

JAPANESE MARITIME REVIEW introduced a program to analyze sodium chloride instead of seawa- ter itself. It also conducts spectro- metric analysis to trace metals in used oil samples.

Together, the two analyses have been used effectively to pinpoint possible seawater contamination and to determine timing ^H for oil renewal. The ferry company, which carries out engine overhauls and maintenance in its own shop, has also developed an onboard system to measure electrical conductivity of the sys- tem oil. This Total Acid Number (TAN) system is an effec- ^^^ tive tool for determining appropriate oil drain intervals.

Through the oil monitoring sys- tem, Sado Kisen detected a poten- tially significant problem in the oil cooling system.

The company was able to take 23731 Madison Street

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Circle 256 on Reader Service Card preventive measures, avoiding possible serious damage to the sys- tem caused by seawater contami- nation.

Sado Kisen's maintenance sys- tem is so effective that the compa- ny provides training to other ferry operators in Japan, but it also relies on Mobil's technical exper- tise. The company was able to reduce the jetfoils oil filling vol- ume by one-half, lowering the fleet's oil consumption and reduc- ing lubrication costs by $10,000 annually.

Sado Kisen had been filling the oil to the system's maximum capacity to avoid oil oxidation and viscosity increase.

Based on the recommendation of

Mobil engineers familiar with the special properties of Mobil Jet Oil

II, the ferry operator reduced the filling volume by one-half and began replacing the oil only when oil sample tests showed unaccept- able oil oxidation, an increase in viscosity or contamination by sea- water. Use of the Mobil lubricant also resulted in better engine cleanliness, according to Sado

Kisen.

Engineered For Performance

Mobil Jet Oil II is acombination of a high stable synthetic base fluid and a package of unique chemical additives. It was formu- lated for thermal and oxidative stability and to resist deterioration and deposit formation both in liq- uid and vapor phases. It also pro- vides excellent resistance to foam- ing.

The lubricant is recommended for use in most aircraft gas turbine engines, including the Allison

Engines used in Sado Kisen's jet- foils. It is just one of a line of

Mobil synthetics designed to serve the specialized needs of the trans- portation industry. "Shipping companies around the world have come to view us as a partner to work with them to solve complex maintenance problems," said Roland Frey, general man- ager of Mobil Marine Sales and

Services. "From operators of small fleets to owners of the largest ves- sels on Earth, we've demonstrated time and time again that our oil and our service can combine to save our customers money," said

Masao Fukuda, sales manager of

Mobil Sekiyu, who helps to service

Sado Kisen's jetfoils.

For more information on Mobil

Circle 6 on Reader Service Card 72 Maritime Reporter/Engineering News