Warning
Caution
1. Position the vehicle on level ground.
2. Remove the oil filler cap and the oil pan drain plug and oil filter drain.
3. Drain the engine oil into a container.
4. Install the oil filter drain plug with the new O-ring.
Tightening torque (oil filter drain plug): 9-10 N·m {91.8-101.9 kgf·cm, 79.7-88.4 in·lbf}
5. Clean the flange surface (seal rubber) of the oil pan drain plug, then install the oil pan drain plug.
Tightening torque (oil pan drain plug): 25-30 N·m {2.6-3.0 kgf·m, 18.8-21.6 ft·lbf}
Note
6. Refill the engine with the specified type and amount of engine oil.
Oil capacity (Approximate quantity)
L {US qt, Imp qt}

Note
Recommended engine oil

7. Refit the oil filler cap.
8. Run the engine and inspect for oil leakage.
9. Inspect the oil level.
10. Start the engine and inspect for oil leakage.
Engine oil inspection
Oil filterMazda 6 Service Manual: Filament inspection
1. Turn the ignition switch to ON position.
2. Turn the rear window defroster switch on.
Caution
Directly touching the rear window defroster filament with the lead
of the voltmeter will damage it. Wrap aluminum foil around the end of the
lead and test the filament by touching it with the ...
Mazda 6 Service Manual: Engine control system operation inspection
Main Relay Operation Inspection
Verify that the main relay clicks when the ignition switch is turned to ON
position and off.
If there is no operation sound, inspect the following.
- Main relay (See RELAY INSPECTION.)
- Harness and connector between ignition switch and main relay termi ...