# Differential oil specification & capacity (2003)

Canonical URL: https://miatatorque.com/spec/differential-oil-capacity-2003/

Applicability: NB 2003 (BP-Z3)

Confidence: fsm

1 L / 1.06 US qt / 0.88 Imp qt · Differential gear oil; API service GL 5; Above –18°C {0°F}: SAE 90; Below –18°C {0°F}: SAE 80

Always confirm against your factory manual. Match every restriction and follow all stages and procedure notes. Disputed claims must not be automatically resolved. The complete record below preserves every printed unit, source claim and procedure.

```json
{
  "id": "differential-oil-capacity-2003",
  "name": "Differential oil specification & capacity (2003)",
  "aliases": [
    "Differential oil specification & capacity",
    "Differential oil type and capacity"
  ],
  "applies_to": [
    {
      "gen": "NB",
      "years": [
        2003,
        2003
      ],
      "engines": [
        "BP-Z3"
      ]
    }
  ],
  "kind": "capacity",
  "capacity": {
    "l": [
      1,
      1
    ],
    "qt_us": [
      1.06,
      1.06
    ],
    "qt_imp": [
      0.88,
      0.88
    ]
  },
  "fluid": {
    "type": "Differential gear oil",
    "viscosity": "Above –18°C {0°F}: SAE 90; Below –18°C {0°F}: SAE 80",
    "standard": "API service GL 5"
  },
  "procedure": {
    "notes": "Fill to the bottom/brim of the filler hole on level ground. Capacity is not permission to overfill."
  },
  "confidence": "fsm",
  "sources": [
    {
      "source": "fsm-2003",
      "page": "PDF p. 1024",
      "as_printed": "Type (API service GL 5)\nAbove –18°C {0°F}: SAE 90\nBelow –18°C {0°F}: SAE 80\nCapacity (Approximate quantity): 1.00 L {1.06 US qt, 0.88 Imp qt}",
      "capacity": {
        "l": [
          1,
          1
        ],
        "qt_us": [
          1.06,
          1.06
        ],
        "qt_imp": [
          0.88,
          0.88
        ]
      },
      "fluid": {
        "type": "Differential gear oil",
        "viscosity": "Above –18°C {0°F}: SAE 90; Below –18°C {0°F}: SAE 80",
        "standard": "API service GL 5"
      },
      "document": {
        "id": "fsm-2003",
        "tier": 1,
        "title": "2003 Mazda MX-5 Miata Workshop Manual (electronic manual capture)",
        "covers": [
          {
            "gen": "NB",
            "years": [
              2003,
              2003
            ],
            "engines": [
              "BP-Z3"
            ]
          }
        ],
        "note": "Normally aspirated BP procedures audited; turbo procedures are covered separately."
      }
    },
    {
      "source": "service-highlights-2003",
      "page": "03–00–1 (PDF p. 15)",
      "as_printed": "Capacity (L {US qt, Imp qt}) 1.00 {1.06, 0.88}",
      "capacity": {
        "l": [
          1,
          1
        ],
        "qt_us": [
          1.06,
          1.06
        ],
        "qt_imp": [
          0.88,
          0.88
        ]
      },
      "document": {
        "id": "service-highlights-2003",
        "tier": 1,
        "title": "2003 Mazda MX-5 Miata/MX-5, MPV Service Highlights (MX-5 sections)",
        "part_number": "9999-95-MODL-03",
        "covers": [
          {
            "gen": "NB",
            "years": [
              2003,
              2003
            ],
            "engines": [
              "BP-Z3"
            ]
          }
        ],
        "note": "October 2002 publication. Only the MX-5 sections were used; MPV specifications are excluded."
      }
    },
    {
      "source": "owners-2003",
      "page": "10-5",
      "as_printed": "Rear differential oil\nL  US qt  Imp qt\n1.0  1.1  0.9",
      "capacity": {
        "l": [
          1,
          1
        ],
        "qt_us": [
          1.1,
          1.1
        ],
        "qt_imp": [
          0.9,
          0.9
        ]
      },
      "document": {
        "id": "owners-2003",
        "tier": 1,
        "title": "2003 Mazda MX-5 Miata Owner’s Manual",
        "covers": [
          {
            "gen": "NB",
            "years": [
              2003,
              2003
            ],
            "engines": [
              "BP-Z3"
            ]
          }
        ],
        "url": "https://www.mazdausa.com/siteassets/pdf/owners-optimized/2003/mx5-miata/2003-mx-5-miata-owners-manual.pdf"
      }
    },
    {
      "source": "owners-2003",
      "page": "10-4",
      "as_printed": "API Service GL-5\nSAE 90",
      "fluid": {
        "type": "Differential gear oil",
        "viscosity": "SAE 90",
        "standard": "API Service GL-5"
      },
      "document": {
        "id": "owners-2003",
        "tier": 1,
        "title": "2003 Mazda MX-5 Miata Owner’s Manual",
        "covers": [
          {
            "gen": "NB",
            "years": [
              2003,
              2003
            ],
            "engines": [
              "BP-Z3"
            ]
          }
        ],
        "url": "https://www.mazdausa.com/siteassets/pdf/owners-optimized/2003/mx5-miata/2003-mx-5-miata-owners-manual.pdf"
      }
    }
  ],
  "jobs": [
    "diff-fluid"
  ],
  "system": "driveshaft-differential",
  "component": "driveshaft-differential-fluids",
  "componentName": "Fluids & capacities",
  "sequence_diagrams": [],
  "url": "https://miatatorque.com/spec/differential-oil-capacity-2003/"
}
```