Vauxhall Magnum

Manual transmission fluid capacity & service interval

Vauxhall Magnum manual transmission fluid capacity is 1,4 liters. Service intervals occur every 10000 km or 3 months. The data covers 3 configurations.

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

TypeSpecifications
Magnum 1.8 (1973-1978)
  • Use: Normal
  • Capacity 1,4 liter
  • Check 10000 km/ 3 months
  • Code: 4/1
Magnum 2.3 (1973-1978)
  • Use: Normal
  • Capacity 1,4 liter
  • Check 10000 km/ 3 months
  • Code: 4/1
Magnum 2.3 HP (1973-1978)
  • Use: Normal
  • Capacity 1,4 liter
  • Check 10000 km/ 3 months
  • Code: 4/1

Additional Notes

  • The Vauxhall Magnum manual transmission holds 1.4 liters of fluid across all three available engine variants: the 1.8, the 2.3, and the 2.3 HP.
  • A 1.4-liter capacity is a relatively modest fill volume, consistent with the compact manual gearboxes commonly fitted to mid-size European passenger cars of the 1970s.
  • The fluid check interval is set at 10,000 km or 3 months, whichever comes first, and applies under normal use conditions for all three configurations.
  • The 3-month time-based threshold in the check interval means that low-mileage operation still triggers a scheduled inspection, reflecting how calendar time alone can degrade fluid condition regardless of distance driven.
  • No variation in manual transmission fluid capacity exists between the 1.8 and the two 2.3-liter variants, despite the difference in engine displacement and output level.
  • The identical 1.4-liter capacity and 10,000 km / 3-month check schedule across the 1973-1978 model range indicates a shared gearbox unit was used throughout the Magnum lineup during that period.

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