Cummins/Onan — Oil sampling for high horsepower engines with Eliminator™ oil filter option
Maintenance · Lubricating oil
From a Cummins/Onan service manual covering: K 19, K1500E, K2000E, K38, K50, QSB 6.7, QSB3.3, QSK23, QSK38, QSK45, QSK50, QSK60…. Check it applies to your exact model before use.
Applies to: Cummins/Onan K 19, Cummins/Onan K38, Cummins/Onan K50, Cummins/Onan QSB 6.7, Cummins/Onan QSK23, Cummins/Onan QSK38, Cummins/Onan QSK45
Procedure
- Take oil samples every 250 hours of operation.
- Analyze samples according to Cummins Engine Oil Recommendations Bulletin 3810340.
- Repeat for at least three oil change intervals to ensure consistent oil behavior.
Full service-parts list: Cummins/Onan K 19 →, Cummins/Onan K38 →, Cummins/Onan K50 →, Cummins/Onan QSB 6.7 →, Cummins/Onan QSK23 →
Source: Cummins/Onan service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.