Cummins/Onan Onan P4500i / P4500 — Adding Oil/Checking Oil Level
Maintenance · Engine oil
For the Cummins/Onan Onan P4500i / P4500, from the Cummins/Onan operator's manual.
Applies to: Cummins/Onan Onan P4500i, Cummins/Onan P4500
Before you start
- This generator has been shipped without oil
Procedure
- Turn the generator off and allow the engine to cool for at least five minutes.
- Place the generator on a level surface in a well-ventilated area.
- Depress the tab on the oil access cover and pull it away from the generator.
- Clean the area around the oil dipstick.
- Slowly unscrew and remove the oil dipstick.
- Using the funnel, slowly pour the supplied engine oil into the oil fill hole; do not overfill.
- Replace and tighten the oil dipstick.
- Install the engine service cover and secure with screws.
Tools required
- Funnel Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Oil type: SAE 10W-30 Amazon eBay $54.99
- Check the engine oil level before each use or every 8 hours of operation
Full service-parts list: Cummins/Onan Onan P4500i →, Cummins/Onan P4500 →
Source: Cummins/Onan operator'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.