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Maintenance
Lubricants and operating fluids
These quality levels help to determine the engine oil change interval. They indicate the engine
oil category factor to be used in relationship to the change interval mentioned in the technical
documentation accompanying your diesel engine.
Category
Engine oil category
1
Engine oil category
2
Engine oil category
2.1
Engine oil category
3
Engine oil category
3.1
Tab. 46: KD engine oil category factors
Engine oil requirements
Generally speaking, engine oils fulfilling the following criteria can be used in Kohler KD diesel
engines. However, a careful check of the characteristics must be undertaken. This measure
ensures that the criteria mentioned in the following sections are explicitly fulfilled before
considering the engine oil as approved for use in KD diesel engines.
Parameter
Visual appearance
Viscosity @ minimum temperature
Viscosity @ operation tempera‐
ture
VI-index
High temperature - High shear
Ignition point
Total base number
Shear stability
NOAK (1 hour @ 250 °C (482 °F))
Ash (sulfur) maximum
Tab. 47: KD engine oil minimum requirements
Engine oil viscosity grade
The viscosity grade is measured against SAE standards. The first number indicates engine oil
viscosity at start-up, on cold conditions (W stands for Winter); the second number indicates
engine oil viscosity at operating conditions (usually considered at 100 °C (212 °F)).
The engine oils presenting these viscosity grades are approved for use in Kohler KD diesel
engines:
184
Engine oil category
Comment
factor
-
Prohibited
1
The change interval is conserved.
1
The change interval is conserved.
2
The change interval can be extended by two times.
2
The change interval can be extended by two times.
Unit
-
mm
/ s
2
mm
/ s
2
-
cP
°C
mg KOH / g
%
%
g / 100 g
© 2023 by Kohler Co. All rights reserved.
Expected value
Without EATS
With EATS
Clear
Clear
3500
3500
10.0 - 14.8
10.0 - 14.8
> 145
> 155
3.5 - 4.3
3.5 - 4.3
> 220
> 220
> 10
> 8
10
10
< 10
< 10
1.9
0.95
KD62V12A 33521061401_1_1 EN_US
Methods
Visual
DIN 51562
DIN 51562
ISO 2909
CEC L36-A-90
ISO 2592
ISO 3771
ASTM D6278
CEC L-040-93
DIN 51575
2023-10
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