Cummins/Onan — Engine oil and filter change

Maintenance · Lubrication system

From a Cummins/Onan owner's manual covering: CFP-015, CFP11E, CFP15E, CFP23E, CFP30E, CFP50, CFP59, CFP5E, CFP60E, CFP7E, CFP83, CFP83-F10…. Check it applies to your exact model before use.

Applies to: Cummins/Onan CFP23E, Cummins/Onan CFP83-F10, Cummins/Onan CFP83 engine

Procedure

1. Operate the engine until coolant temperature reaches 70 C (158 F); shut the engine off.
2. Place an appropriate container under the oil pan drain plug.
3. Remove the oil drain plug and drain the oil immediately.
4. Clean the area around the oil filter canister; use a filter wrench to remove the filter.
5. Remove and discard the O-ring seal if it remained on the mounting flange; clean the flange.
6. Apply a light film of 15W-40 lubricating oil to the replacement filter gasket.
7. Fill the oil filter with a high-quality 15W-40 multi-viscosity oil such as Premium Blue.
8. Center the filter ring and screw on until the gasket is snug, then tighten an additional 1/4 turn.
9. Check and clean the oil pan drain plug threads; install the plug and torque per tables.
10. Fill the engine to the proper level with clean 15W-40 oil.
11. Restart the engine and let it run approximately one to two minutes.
12. Stop the engine and wait approximately fifteen minutes for oil to drain back.
13. Check the oil level and add oil to the H mark on the dipstick.

Full service-parts list: Cummins/Onan CFP23E →, Cummins/Onan CFP83-F10 →

Source: Cummins/Onan owner's 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.

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