Wolseley 18/85, Six, ADO17

Clutch fluid capacity & service interval

Wolseley 18/85, Six, and ADO17 models utilize clutch fluid. Service intervals include checks at 5000 km or 3 months and 10000 km or 6 months, with changes at 30000 km or 18 months. The data covers 4 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
Six (1972-1975)
  • Use: Normal
  • Between min and max.
  • Check 10000 km/ 6 months
  • Change 30000 km/ 18 months
Six automatic (1972-1975)
  • Use: Normal
  • Between min and max.
  • Check 10000 km/ 6 months
  • Change 30000 km/ 18 months
18/85 (1967-1972)
  • Use: Normal
  • Between min and max.
  • Check 5000 km/ 3 months
  • Change 30000 km/ 18 months
18/85 automatic (1967-1972)
  • Use: Normal
  • Between min and max.
  • Check 5000 km/ 3 months
  • Change 30000 km/ 18 months

Additional Notes

  • All four configurations across the Wolseley 18/85, Six, and ADO17 lineup use a hydraulic clutch system, meaning clutch engagement is actuated through fluid pressure rather than a mechanical cable.
  • The fluid level specification for all configurations is expressed as a range between a minimum and maximum mark rather than a fixed volume, which is typical of reservoir-based hydraulic systems where the correct level is verified visually against the reservoir's marked indicators.
  • The 18/85 and 18/85 automatic (1967-1972) share an identical check interval of every 5000 km or 3 months under normal use conditions, whichever comes first.
  • The Six and Six automatic (1972-1975) have a longer check interval of 10000 km or 6 months under normal use conditions, doubling the distance and time thresholds compared to the 18/85 variants.
  • Despite the difference in check intervals between the 18/85 and Six variants, all four configurations share the same fluid change interval of 30000 km or 18 months under normal use conditions.
  • The alignment of the change interval across both the manual and automatic transmission versions within each model generation indicates the hydraulic clutch reservoir and fluid specification were not differentiated by transmission type in either the 18/85 or Six series.

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