Mazda RX-7, FC (EU)
Differential fluid capacity & service interval
Mazda RX-7, FC (EU) differential fluid capacity is 1,3 liters. Service intervals include checking every 15000 km or 12 months and changing every 35000 km or 36 months. The data covers 4 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
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Additional Notes
- All four configurations across the full 1985-1992 production span share an identical rear differential fluid capacity of 1.3 liters, a figure consistent with a standard service fill rather than an overhaul quantity, which would typically account for additional volume lost during disassembly.
- The change interval is uniform across every configuration at 35,000 km or 36 months under normal use conditions, meaning the fluid replacement schedule does not vary between the standard and limited slip differential variants.
- The 1985-1986 standard rear differential carries an additional check interval of 15,000 km or 12 months, a specification absent from the limited slip variant of the same years, indicating a distinct monitoring requirement for the open differential in that period.
- The Mazda RX-7 FC (EU) 1987-1992 configurations, both standard and limited slip, list no separate check interval, carrying only the 35,000 km or 36-month change interval under normal use conditions.
- The limited slip differential variant across both the 1985-1986 and 1987-1992 periods retains the same 1.3-liter capacity as the standard rear differential, with no capacity difference recorded between the two differential types.