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Marine Lubricants (continued) ing lubricants which provide protec- tion against ash deposits and valve guttering. The lubricants offer high- temperature detergency and pro- vide a unique degree of high disper- sancy during intermittent, cyclic, and high-idling service, thereby controlling soot and minimizing sludge formation. As a result, their protection of slipper bushings and piston liners against wear is excel- lent. They also provide excellent valve train wear protection. Mobilmar 100 Series oils are available in three SAE grades: 30, 40, and 50 to optimize film thick- ness. These oils meet the low-ash requirements of heavy-duty, two- cycle diesel engines. Mobilgard 450 SAE 40 engine oil is formulated with high quality base stocks which provide low consump- tion characteristics, high tempera- ture oxidation resistance and ther- mal stability. These base stocks are combined with specially selected sta- ble additives resulting in an engine oil with well-balanced properties. Its detergent /dispersant qualities Asea Brown Boveri service has the speed and skill to keep the ball in the air. The great majority of diesel engines over 500 kW have BBC turbochargers, so an extraordinarily wide-spread, fast and efficient service organization to spare you nasty surprises will come as no sur prise. From the first (which we were) our aim has been to lead (which we do) in achiev ing the highest benefits at the lowest costs. And we do it most effectively. It's been proved by experience Every year we train over a hundred technicians in providing fast, flawless service at minimum cost. They are based at service centers strategically located all over the world. And backed by a cen tral register containing instant, precise details about your turbocharger. Their job is to keep things running. To keep the ball in the air ABB TURBOCHARGER CO. 1460 Livingston Ave. North Brunswick, New Jersey 98902 Telephone 201-932-6241 ASEA BROWN BOVERI result in increased filter life and engine cleanliness levels. Mobilgard 450 engine oil has proven its superior heavy duty ser- vice with fuel oil up to two percent sulfur. Mobilgard 450 has proven its performance in extensive service in engines manufactured by Electro- Motive Division of GM, General Electric, ALCO, Fairbanks Morse, Detroit Diesel, Caterpillar and Cummins. SHELL OIL Circle 85 on Reader Service Card With the introduction of Caprin- us® UE Multigrade, 17 Total Base Number (TBN) and Caprinus U Multigrade (13 TBN), Shell Oil now offers two new products for tugs, workboats, coastal tankers, auxilia- ry power generators and other me- dium-speed diesel applications. The 17 TBN Caprinus UE 20W- 40 is formulated for extended oil life in newer, low-oil-consumption en- gines such as GE's in severe service. Caprinus U has its widest applica- tion in EMD diesels and GE engines in less severe service. According to Shell, compared to the single grade oil now used, Ca- prinus multigrade oils can cut oil and fuel consumption. This was proven during an 18-month field testing using 16-cylinder EMD die- sels. Oil consumption reportedly dropped over 20 percent. In load- box and dynamometer tests con- ducted on two- and four-stroke cy- cle engines, Shell reports a fuel sav- ings of 1 percent. Shell reports that less wear, bet- ter cold starts and extended drain intervals should also accompany in- stallation of Caprinus multigrade oils. When Caprinus multigrade oil is pitted against an SAE 40 grade, Shell claims bearing weight loss is cut almost in half. Almost all operators want to ex- tend drain intervals between sched- uled shutdowns for maintenance. An oil's ability to do its job over the extended interval is usually limited by one of two things—the loss of grade due to viscosity increase or by exhaustion of capacity to absorb acid by-products of combustion, as measured by TBN. Regarding the viscosity increase, Shell's Shellvis viscosity index improver does an excellent job of grade retention. And the high alkalinity of Caprinus UE (TBN 17), which results from Shell's proprietary detergent tech- nology, should furnish all the acid- absorbing capacity needed for long- er drain periods. Operations with EMD diesels, where long-term TBN management is not as pivotal an issue, will also benefit. Thanks to Shell's detergent technology, Caprinus U Multigrade with a 13 TBN offers a TBN reten- tion comparable to many competi- tive 17 TBN products. TEXACO Circle 110 on Reader Service Card Texaco offers a complete line of quality marine lubricants which are available worldwide to meet the (continued on page 51)
