Updated specs are available.
Differential oil type and capacity (1990)
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Not yet checked against the factory manual for your car's year. It's verified in the 1990 Mazda MX-5 Miata Workshop Manual; later manuals may differ.
0.69 US qt0.65 L0.65 L0.69 US qt0.57 Imp qtDifferential gear oil; API GL-5; SAE 90 above −18°C (0°F); SAE 80W below −18°C (0°F)
Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure
Add the specified oil through the filler plug until the level reaches the bottom of the plug hole.
Applies to
- NA 1990 (B6)
- Verified in: 1990 Mazda MX-5 Miata Workshop Manual
Sources
- Part no. 1193-10-89CPage M–240.69 US qt0.65 L0.65 L0.69 US qt0.57 Imp qtDifferential gear oil; API GL-5; SAE 90 above −18°C (0°F); SAE 80W below −18°C (0°F)Printed: “Above −18°C (0°F): API GL-5, SAE 90 Below −18°C (0°F): API GL-5, SAE 80W Capacity: 0.65 liter (0.69 US qt, 0.57 Imp qt)”