Vauxhall Magnum

Differential fluid capacity & service interval

Vauxhall Magnum differential fluid capacity is 2 liters. Service intervals consist of checks every 10000 km or 3 months. 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)
  • Rear
  • Use: Normal
  • Capacity 2 liter
  • Check 10000 km/ 3 months
  • Magnum 2.3 (1973-1978)
  • Rear
  • Use: Normal
  • Capacity 2 liter
  • Check 10000 km/ 3 months
  • Magnum 2.3 HP (1973-1978)
  • Rear
  • Use: Normal
  • Capacity 2 liter
  • Check 10000 km/ 3 months

Additional Notes

  • All three configurations of the Vauxhall Magnum covered in these specifications share an identical rear differential fluid capacity of 2 liters, which is a typical service fill volume for a rear differential unit of this era and vehicle class.
  • The 2-liter capacity figure represents the amount of fluid the rear differential housing holds during normal servicing, as opposed to a larger overhaul fill that might account for additional passages or a complete drain-and-refill of an associated assembly.
  • The 1.8, 2.3, and 2.3 HP variants all carry the same 10,000 km or 3-month check interval for the rear differential fluid under normal use conditions, indicating no differentiation in service scheduling across engine displacements for this system.
  • A check interval of 10,000 km or 3 months, whichever comes first, reflects a time-based threshold alongside a distance-based one, meaning lower-mileage vehicles still require attention within the 3-month window regardless of kilometers accumulated.
  • The specifications apply uniformly across the full 1973-1978 model year span for all three engine variants, with no year-specific deviations recorded for capacity or interval within that range.
  • The rear differential designation in all three rows confirms these specifications apply specifically to the rear axle assembly, distinguishing the service point from any front-end or transmission-related fluid systems.

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