View non-flash version
MARINE LUBRICANTS MEETING THE DEMANDS OF NEW AND UPGRADED DIESELS —Improved Cylinder And Crankcase Oils— The trend toward upgrading out- put and efficiency of marine diesel engines, as well as improving their ability to burn heavy residual fuels with high sulfur content, has placed increasing demands on the petroleum industry to improve their products. The oil producers have responded by offering new and reformulated marine lubri- cants, including highly alkaline cylinder oils to protect against the acidity resulting from the burning of residual fuels, and improved sys- tem oils to meet the severe-service demands of the latest engines. The following review is based on data supplied by the major U.S. producers of marine lubricants. Tree brochures and data sheets giv- ing full details on the formulations and capabilities of these oils are available from all of the producers included in this review. To obtain copies, just circle the appropriate Reader Service Number(s) on the postage-paid card in the back of this issue. BP MARINE Circle 42 on Reader Service Card During the past 30 years, the low- speed crosshead diesel engine has established itself as the preeminent power plant for marine propulsion. Two major factors contributed to this success story. One was the en- gine's ability to run on low-cost, heavy residual fuels, and thus com- bine maximum economic benefits with the already low specific fuel consumption of this design. The other was the oil industry's develop- ment of highly alkaline cylinder oils. BP's Energol CLO 50M marine cylinder oil was formulated specifi- cally to neutralize the acidic prod- ucts of combustion formed by these high-sulfur fuels—a lubricant that gives the shipowner an ideal balance between low running costs and low wear rates in all modern engines. Energol CLO 50M is formulated from a blend of high-quality base oils and a balanced combination of alkaline, detergent, and dispersant additives. Together they provide an outstanding level of lubrication, de- spite the acidic conditions that arise where heavy residual fuels are burned. The alkalinity of CLO 50M neu- tralizes acidic products of combus- tion that would otherwise attack lin- ers, pistons, piston rings, and ring grooves. Its high level of detergency helps to keep grooves, lands, skirts, and ports clean and deposit-free. The high level of detergency helps to maintain a high state of internal cleanliness, and keeps cylinder drainings and scavenge space depos- its in a fluid state, for ease of drain- age. BP's Energol OE-M 30 has long been associated with the successful lubrication of the crankcase systems of crosshead marine diesel engines. Increased automation, reduced shipboard manning levels, and, probably more significantly, changes in engine operational prac- tices, have led to a reduction in the use of water-washing to maintain system oil condition. The availabili- ty of improved additive technology has enabled the development of En- ergol OE-M 30 (New Formula). Energol OE-M 30 (New Formula) is recommended for the crankcase system of crosshead marine diesel engines, and is suitable for use in engines with either water- or oil- cooled pistons. It has been approved by all major engine manufacturers, but for some engine types with more severe system oil operating condi- tions, a higher total base number (TNB) alkaline oil such as BP Ener- gol DL-MP 30 may be preferred. In addition to its application in crank- cases, it is also recommended for camshaft systems, shaft bearings, stern tubes and seals, air compres- sors, small gearboxes, and for gener- al lubrication. Energol OE-M 30 (New Formula) is formulated using the latest addi- tive technology. It has excellent water separation properties, has im- proved thermal/oxidiation stability properties, and also displays im- proved anti-rust performance char- acteristics. The new additive system also imparts a degree of acid neu- tralizing alkalinity and detergency/ dispersancy properties. Energol IC-HF high-quality, crankcase/cylinder oils for medium- speed diesels have an established reputation for the effective lubrica- tion of engines burning heavy fuel. Recent trends indicate that higher levels of alkalinity will be needed if engine protection is to be main- tained. BP has anticipated this re- quirement with a new, improved range of Energol IC-HF (Internal Combustion-Heavy Fuel) oils. In the reformulation of Energol IC-HF, selected base oils give ther- mal stability and effective bearing lubrication, while the newly devel- oped additive combination provides alkalinity, detergency, dispersancy, anti-oxidation, gear-lubrication per- formance, and rust prevention. IC- HF oils insure low rates of wear and high levels of engine cleanliness, thereby enabling engines to perform efficiently and economically. With the new IC-HF oils there is a complete range from which the user can choose. They offer a choice of three TBNs, and are designed to meet all the demands imposed by residual fuels for engines currently in service and for those likely to be introduced in the near future. More- over, the nomenclature of these grades enables the user to identify the characteristics at a glance, and thus select the grade that suits the particular requirements. CHEVRON Circle 43 on Reader Service Card Fifty years of experience are be- hind Chevron International Oil Company's DELO (Diesel Engine Lube Oil) products, Now the com- pany offers an improved line of ma- rine trunk piston engine oils to lubricate the medium-speed diesels of today and the future. Medium- speed diesel engines of today oper- ate at higher outputs and on a wide range of varying-quality fuels. Chevron's improved line of truck piston engine oils exceed the chal- lenging lubrication demands of to- day's engines. They provide: better thermal and oxidation stability; im- proved detergency and dispersancy (deposit control); excellent alkalini- ty and base retention; higher wear protection; and good water toler- ence. The excellent performance of these improved lube oils is backed by many hours of severe laboratory testing—engine and bench tests—as well as field testing in the latest design, highly rated trunk piston engines. The products are approved by the leading engine manufactur- ers. Further, DELO marine oils are compatible with all engine lubri- cants currently marketed. Thermal and oxidation stability are prime requisites for trunk piston engine oils for today's engines. Higher specific output engines using heavier fuel produce higher liner surface and piston temperatures. The lube oil must possess a high thermal stability to withstand the high thermal stresses involved in removing combustion heat. The re- sistance to oxidation of the new DELO marine is said to be oustand- ing. All the reformulated Chevron DELO marine oils meet the require- ments of the API Service Classifica- tion CD and pass the MWM-B test. Chevron DELO 1000 marine oil is recommended for all types of trunk piston diesel engines using relative high sulfur distillate fuel or black marine diesel oil. DELO 2000 and 3000 marine oils are suitable for trunk piston engines burning residual fuels with a maxi- mum sulfur level of 2.5 and 3.5 mass percent, respectively. DELO 3400 marine oil will satisfy those applications where a lubricant with high alkalinity is desired or specifically recommended by the engine manufacturer. Available in SAE Grades 30 and 40, the reformulated DELO marine oils are approved by all major en- gine builders for use in their me- dium-speed engines. From the experience obtained with the reformulated Chevron DELO marine oils in extended labo- ratory and field testing, these oils are said to provide: long engine life; long oil life; low engine maintenance costs; trouble-free engine operation; and economic operation. CUMMINS Circle 44 on Reader Service Card Cummins P^ngine Company re- cently announced availability of its Premium Blue engine oil for the marine market. Cummins reports this premium 15W-40 oil contains additives selected to maximize the performance of heavy-duty diesel engines. Paul A. Bennett, director-fuel and lubricants, and the chief design- er of the product, stated: "Owners and operators are increasingly com- ing to realize that not all oils are created equal. Cummins has de- cided that the company can provide valuable service by making an oil that represents the best available technology focused on improving engine durability. Premium Blue is that oil." Cummins Premium Blue is the 46 Maritime Reporter/Engineering News
