Opel GT

Manual transmission fluid capacity & service interval

Opel GT manual transmission fluid capacity ranges from 0,6 to 1,1 liters. Service intervals include a check every 10000 km. The data covers 2 configurations.

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

TypeSpecifications
GT 1.1 (1969-1973)
  • Use: Normal
  • Capacity 0,6 liter
  • Check 10000 km
  • Code: 4/1
GT 1.9 (1969-1973)
  • Use: Normal
  • Capacity 1,1 liter
  • Check 10000 km
  • Code: 4/1

Additional Notes

  • The Opel GT 1.9 carries a manual transmission fluid capacity of 1.1 liters, which is nearly double the 0.6 liter capacity specified for the 1.1 variant across the same 1969-1973 production span.
  • A 0.6 liter fill in the GT 1.1 reflects a relatively compact gearbox unit, consistent with the smaller displacement engine paired to a lighter-duty transmission assembly.
  • The 1.1 liter capacity of the GT 1.9 transmission suggests a physically larger gearbox designed to handle the greater torque output of the 1.9-liter engine.
  • Both configurations share an identical 10,000 km check interval under normal use conditions, meaning neither engine variant calls for a more frequent inspection schedule than the other.
  • The specification lists a fluid check interval rather than a full drain-and-fill interval, indicating the service action defined at 10,000 km is a level verification rather than a complete fluid replacement.

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