Mitsubishi S12A2 — Change engine oil and oil filters / bypass oil filter
Maintenance · Lubrication system
For the Mitsubishi S12A2, from the Mitsubishi owner's manual.
Applies to: Mitsubishi S12A2, Mitsubishi S12A2 engine
Before you start
- Hot oil and components can cause personal injury.
- Do not remove the oil by suction whenever possible.
Parts for this job
Part numbers from the service-parts list for Mitsubishi S12A2. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Stop the engine, remove the oil pan drain plug and drain the oil while warm.
- Place a container under the oil filter and remove the used cartridge with a filter wrench.
- Clean the filter base with a clean cloth.
- Check the new filter packing is seated, coat packing with clean engine oil.
- Install the new filter; when packing contacts the base, tighten 3/4 to 1 turn more.
- Clean and install the drain plug, fill with recommended oil.
- Run the engine at low idle several minutes and check for leaks.
- Stop the engine, wait about 10 minutes and check the oil level with the dipstick.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Oil pan: 100 or 170 liters; whole engine: 120 or 190 liters
- Recommended oil: API Engine Service Classification CF
Full service-parts list: Mitsubishi S12A2 →
Source: Mitsubishi 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.