Opel Admiral

Manual transmission fluid capacity & service interval

Opel Admiral manual transmission fluid capacity is 1,1 liters. Service intervals include 10000 km or 10000 km/6 months. The data covers 5 configurations.

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

TypeSpecifications
Admiral 2.8 E (1969-1977)
  • Use: Normal
  • Capacity 1,1 liter
  • Check 10000 km/ 6 months
  • Code: 4/1
Admiral 2.8 H (1969-1977)
  • Use: Normal
  • Capacity 1,1 liter
  • Check 10000 km/ 6 months
  • Code: 4/1
Admiral 2.8 S (1969-1977)
  • Use: Normal
  • Capacity 1,1 liter
  • Check 10000 km/ 6 months
  • Code: 4/1
Admiral 2.8 (1966-1968)
  • Use: Normal
  • Capacity 1,1 liter
  • Check 10000 km
  • Code: 4/1
Admiral 2.6 (1964-1966)
  • Use: Normal
  • Capacity 1,1 liter
  • Check 10000 km
  • Code: 4/1

Additional Notes

  • The Opel Admiral manual transmission fluid capacity is 1.1 liters across all five configurations spanning the 2.6 and 2.8 engine variants from 1964-1977. A capacity in the low single-liter range is characteristic of compact manual gearboxes in passenger cars of that era.
  • The Admiral 2.6 (1964-1966) and Admiral 2.8 (1966-1968) share an identical service interval of a fluid level check every 10,000 km under normal use conditions.
  • The three 2.8 variants introduced for 1969-1977, namely the 2.8 E, 2.8 H, and 2.8 S, carry a revised check interval of 10,000 km or 6 months, whichever comes first. The addition of a time-based threshold alongside the distance-based one means the interval is governed by both criteria under normal use conditions.
  • The 1.1-liter fluid capacity figure applies uniformly as a service fill level across all listed configurations. A consistent capacity across the 2.6 and multiple 2.8 variants suggests the same or dimensionally equivalent gearbox housing was used throughout the Admiral range from 1964-1977.
  • The shift from a distance-only check interval in the 1964-1968 models to a dual distance-and-time interval in the 1969-1977 models represents the primary specification difference between the earlier and later Admiral configurations in the manual transmission fluid data.

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