16 MAINTENANCE
ENGLISH
Lubricating oil
With strict emission control regulations now in effect, the CG-4, CH-4 and CI-4 engine oils have been developed
for use with low sulfur fuels, for On-Highway vehicle engines. When a Non-Road engine runs on high sulfur fuel,
it is advisable to use a "CF or better" classification engine oil with a high Total Base Number (a minimum TBN of
10 is recommended).
A Lubricating oil recommended when a low-sulfur or high-sulfur fuel is employed.
{ : Recommendable : Not recommendable
*TBN: Total Base Number
**Fuel
A Diesel Fuel Specification Type and Sulfur Content % (ppm) used, must be compliant with all applicable emission
regulations for the area in which the engine is operated.
A Use of diesel fuel with sulfur content less than 0.10 % (1000 ppm) is strongly recommended.
A If high-sulfur fuel (sulfur content 0.50 % (5000 ppm) to 1.0 % (10000 ppm)) is used as a diesel fuel, change the
engine oil and oil filter at shorter intervals. (approximately half)
A DO NOT USE Fuels that have sulfur content greater than 1.0 % (10000 ppm).
A Since KUBOTA diesel engines of less than 56 kW (75 hp) utilize EPA Tier 4 and Interim Tier 4 standards, the use
of ultra low sulfur fuel is mandatory for these engines, when operated in US EPA regulated areas. Therefore, please
use No.2-D S15 diesel fuel as an alternative to No.2-D, and use No.1-D S15 diesel fuel as an alternative to No.1-
D for ambient temperatures below -10°C (14°F).
No.1-D or No.2-D, S15 : Ultra Low Sulfur Diesel (ULSD) 15 ppm or 0.0015 wt.%
A CJ-4 classification oil is intended for use in engines equipped with DPF (Diesel Particulate Filter) and is Not
Recommended for use in Kubota E3 specification engines.
A Oil used in the engine should have API classification and Proper SAE Engine Oil according to the ambient
temperatures as shown below:
Lubricating
oil classification
**Fuel
Remarks
Low-sulfur High-sulfur
CF {{*TBN 10
CG-4 {
CH-4 {
CI-4 {
Above 25°C (77°F) SAE30, SAE10W-30 or 15W-40
-10 to 25°C (14°F to 77°F)
SAE10W-30 or 15W-40
Below -10°C (14°F)
SAE10W-30
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