How To Select Engine Oil For Diesel Generator Sets

How to Select Engine Oil for Diesel Generator Sets
 

Diesel Generator Set Engine Oil Selection Standards (Just Follow as Purchased)

Ⅰ. Quality Grade (API Diesel-Specific C Series)

1. Ordinary naturally aspirated, older generator sets: CF-4

2. Turbocharged, commonly used new machines, mainstream engines like Cummins/Yuchai/Weichai: CH-4, CI-4 (most recommended, most versatile)

3. National III/National IV electronic injection, with exhaust after-treatment: CJ-4 low-ash
⚠️ Absolutely do not use gasoline engine oils (SN, SL, or other S-grade oils).

Ⅱ. Viscosity Grade (SAE selected according to ambient temperature)
- Suitable for most regions nationwide in all seasons: 15W-40 (standard for installed units, used by 90% of generator sets)
- Northern winter, low-temperature areas: 10W-30 / 5W-40
- Extremely cold below -30°C: 0W-40 full synthetic
- Old machines, high temperature and heavy load in summer: 20W-50

Ⅲ. Universal Standard Configuration
- Universally recommended for all networks: CH-4 15W-40 for Weichai, Yuchai, Cummins, Shangchai, Changchai; can be used for all ordinary generator sets.

Ⅳ. Replacement Cycle
- Normal conditions: every 250 hours or one year, whichever comes first
- Dusty conditions, continuous full load: every 150-200 hours

Tell me whether your generator set is Weichai, Yuchai, or Cummins, and whether it is located in the south or the north, and I can provide a unique, precise model for you, so you won't have to worry.