Differential Oil Replacement

Remove the filler and drain plugs.
Drain the differential oil into a container.
Wipe the plugs clean.
Install the drain plug and a new washer.
1. Tightening torque 40-53 N.m {4.0-5.5 kg.m, 29-39 ft.lbf}
Fig 1: Replacing Differential Oil
Courtesy of MAZDA MOTORS CORP.
Add the specified oil from the filler plug until the level reaches the brim of the plug hole.
Specified oil
1. Type (API service GL-5)
2. Above -18°C {0°F}: SAE 90
3. Below -18°C {0°F}: SAE 80
4. Capacity (Approximate quantity): 1.00 L {1.06 US qt, 0.88 Imp qt}
Install the filler plug.
1. Tightening torque 40-53 N.m {4.0-5.5 kgf.m, 29-39 ft.lbf}