3Com Caterpillar Commercial Diesel Engine SEBU6251-06 - Manual (Page 8)

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.
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
Ambient Temperature Caterpillar DEO
Multigrade
EMA LRG-1
API CH-4
API CG-4 and
API CF-4
Viscosity Grade
Minimum Maximum
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)
i01111341
Engine Oil (3116 and 3126
Marine Engines)
SMCS Code: 1348
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