
8
Maintenance Section Lubricant Specifications
NOTICE
Operating Direct Injected (DI) diesel engines with fuel sulfur levels over 1.0 percent may require shortened oil change intervals in order to help maintain adequate wear protection.
i01111341
Engine Oil (3116 and 3126 Marine Engines)
SMCS Code: 1348
Lubricant Viscosity Recommendations for Direct Injection (DI) Diesel Engines
The proper SAE viscosity grade of oil is determined by the minimum ambient temperature during cold engine
Refer to Table 2 (minimum temperature) in order to determine the required oil viscosity for starting a cold engine.
Refer to Table 2 (maximum temperature) in order to select the oil viscosity for engine operation at the highest ambient temperature that is anticipated.
Generally, use the highest oil viscosity that is available to meet the requirement for the temperature at
Table 2
Engine Oil Viscosity
Caterpillar DEO | Ambient Temperature | |
Multigrade |
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EMA |
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API | Minimum | Maximum |
API | ||
API |
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Viscosity Grade |
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SAE 0W20 | −40 C (−40 F) | 10 C (50 F) |
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SAE 0W30 | −40 C (−40 F) | 30 C (86 F) |
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SAE 0W40 | −40 C (−40 F) | 40 C (104 F) |
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SAE 5W30 | −30 C (−22 F) | 30 C (86 F) |
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SAE 5W40 | −30 C (−22 F) | 40 C (104 F) |
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SAE 10W30 | −20 C (−4 F) | 40 C (104 F) |
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SAE 15W40 | −15 C (5 F) | 50 C (122 F) |
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Recommendations
Caterpillar does not recommend the use of multigrade oils in the 3116 and 3126 Marine Diesel Engines with mechanical unit injection.
Multigrade oils use high molecular weight polymers as viscosity index improvers.
When the crankcase blowby flows through the turbocharger and the aftercooler, the viscosity index improvers in the oil vapor can adhere to the turbocharger compressor and aftercooler core.
The fouling of the turbocharger and aftercooler can cause reduced air flow, loss of power, and increased black smoke. The emission of black smoke results in buildup of soot on the transom of the boat.
Note: Caterpillar recommends the use of single grade oils with the API
Caterpillar Special Application Engine Oil (SAEO)
Note: Special Application Engine Oil is for use in Caterpillar 3116 and 3126 Marine Diesel Engines with mechanical unit injection. This includes all 3116 and 3126 Marine Diesel Engines that begin with the following serial number prefixes: (S/N: 4KG), (S/N: 1SK), (S/N: 8NM), and (S/N: 6SR).
The factory fill in 3116 and 3126 Marine Engines is Caterpillar Special Application Engine Oil (SAEO). The oil that is used for the factory fill has the following properties:
•API
•Viscosity of SAE 30
For maximum performance in 3116 and 3126 Marine Diesel Engines with mechanical unit injection, Caterpillar recommends the following engine oil:
•Caterpillar Special Application Engine Oil (SAEO) with a viscosity of SAE 30
•Caterpillar Special Application Engine Oil (SAEO) with a viscosity of SAE 40