68531 Mercruiser NUT, ALTERNATOR TERMINAL (#12-24)

These recommendations are subject to change without notice. Contact your local Cat dealer for the most up-to-date fluids recommendations.
EMA____________________Engine Manufacturers Association
API____________________American Petroleum Institute
SAE____________________Society Of Automotive Engineers Inc.
DEO-ULS ____________________ Diesel Engine Oil-Ultra Low SulfurCat DEO-ULS
Cat DEO-ULS is developed and tested in order to provide superior protection and life for your Caterpillar engines.
Better Detergents
Advanced Additive Package
Enhanced Dispersants
Improved Protection from Thermal breakdown and Oxidation BreakdownDue to significant variations in the quality and in the performance of commercially available oils, Caterpillar makes the following recommendations:
Cat DEO-ULS (SAE 10W-30)
Cat DEO-ULS (SAE 15W-40)Cat DEO-ULS Multigrade oil is available in various viscosity grades that include SAE 10W-30 and SAE 15W-40. To choose the correct viscosity grade for the ambient temperature, see illustration 1. Multigrade oils provide the correct viscosity for a broad range of operating temperatures. Multigrade oils are also effective in maintaining low oil consumption and low levels of piston deposits.Consult your Cat dealer for part numbers and for available sizes of containers.Note: Cat DEO-ULS in SAE 15W-40 passes the following proprietary tests: sticking of the piston ring, oil control tests, wear tests and soot tests. Proprietary tests help ensure that Caterpillar multigrade oil provides superior performance in Caterpillar Diesel Engines. In addition, Cat DEO-ULS Multigrade oil exceeds many of the performance requirements of other manufacturers of diesel engines. Therefore, this oil is an excellent choice for many mixed fleets. True high performance oil is produced with a combination of the following factors: industry standard tests, proprietary tests, field tests and prior experience with similar formulations. The design and the development of Caterpillar lubricants that are both high performance and high quality are based on these factors. Commercial Oils
Note: Non-Caterpillar commercial oils are second choice oils.
Caterpillar require the use of the following specification of engine oil. Failure to use the appropriate specification of engine oil will reduce the life of your engine. Failure to use the correct specification of engine will also reduce the life and the effectiveness of your aftertreatment system.
Table 1
API Classifications for the Industrial Engine
Oil Specification
ECF-3
CJ-4
AECA E9
Failure to follow these oil recommendations can cause shortened engine service life due to deposits and/or excessive wear.
Note: Refer to Special Publication, SEBU6251, "Caterpillar Commercial Diesel Engine Fluids Recommendations" for additional information