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 start-up, and the maximum ambient temperature during engine operation.

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 start-up.

Table 2

Engine Oil Viscosity

Caterpillar DEO

Ambient Temperature

Multigrade

 

 

 

 

EMA LRG-1

 

 

API CH-4

Minimum

Maximum

API CG-4 and

API CF-4

 

 

Viscosity Grade

 

 

 

 

 

SAE 0W20

40 ￿C (40 ￿F)

10 ￿C (50 ￿F)

 

 

 

SAE 0W30

40 ￿C (40 ￿F)

30 ￿C (86 ￿F)

 

 

 

SAE 0W40

40 ￿C (40 ￿F)

40 ￿C (104 ￿F)

 

 

 

SAE 5W30

30 ￿C (22 ￿F)

30 ￿C (86 ￿F)

 

 

 

SAE 5W40

30 ￿C (22 ￿F)

40 ￿C (104 ￿F)

 

 

 

SAE 10W30

20 ￿C (4 ￿F)

40 ￿C (104 ￿F)

 

 

 

SAE 15W40

15 ￿C (5 ￿F)

50 ￿C (122 ￿F)

 

 

 

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 CF-4 classification for all 3116 and 3126 Marine Engines unless crankcase blowby has been routed completely away from the air cleaner inlet.

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 CF-4 classification

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