Cummins/Onan P4500 — Add Engine Oil
Maintenance
For the Cummins/Onan P4500, from the Cummins/Onan operator's manual.
Applies to: Cummins/Onan P4500
Procedure
- Unclip and remove oil service panel to access oil fill drain plug.
- Remove oil fill plug and dipstick.
- Using supplied 4-cycle engine oil and funnel, slowly add oil until full.
- Do not overfill; oil will drain out through fill plug if too high.
Tools required
- Funnel Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: 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.