Bentley Eight, Mulsanne
Automatic transmission fluid capacity & service interval
Bentley Eight and Mulsanne require automatic transmission fluid with a capacity of 7,3 liters. Service intervals occur every 25000 km or 12 months. The data covers 2 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| Eight (1986-1992) |
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| Mulsanne S (1986-1992) |
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Additional Notes
- The Bentley Eight and Mulsanne S share an identical automatic transmission fluid capacity of 7.3 liters, which is consistent with a service fill figure for a large-displacement luxury vehicle of that era.
- A 7.3-liter capacity places the automatic transmission in a range typical of full-size, multi-step automatic units, where fluid volume plays a significant role in maintaining hydraulic pressure and thermal stability.
- The service interval for both configurations is set at 25,000 km or 12 months, whichever comes first, meaning time elapsed is treated as an equally valid trigger as distance traveled.
- The 12-month time-based interval reflects the nature of fluid degradation, which occurs through oxidation and moisture absorption regardless of mileage accumulated.
- Both the Eight and Mulsanne S carry normal-use interval designations, meaning the 25,000 km / 12-month schedule applies under standard operating conditions rather than a reduced severe-duty cycle.
- The capacity and interval figures are identical across the 1986-1992 production span for both models, indicating no mid-cycle revision to the automatic transmission service specification during those years.