MG MGB / MGC

Automatic transmission fluid capacity & service interval

MG MGB / MGC automatic transmission fluid capacity ranges from 6 to 7.25 liters. The data covers 3 configurations.

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

TypeSpecifications
MGC (1967-1969)
  • Use: Normal
  • Capacity 7,25 liter
MGB GT (1965-1974)
  • Use: Normal
  • Capacity 6 liter
MGB (1962-1974)
  • Use: Normal
  • Capacity 6 liter

Additional Notes

  • The MGB roadster (1962-1974) and MGB GT (1965-1974) share an identical automatic transmission fluid capacity of 6 liters, indicating the same transmission unit was used across both body styles.
  • The MGC (1967-1969) carries a notably larger automatic transmission fluid capacity of 7.25 liters, reflecting a physically larger transmission assembly suited to the MGC's six-cylinder engine.
  • The 1.25-liter difference between the MGB's 6-liter capacity and the MGC's 7.25-liter capacity is a meaningful distinction at the service level, as underfilling a larger unit with the smaller figure would leave the transmission operating below its designed fluid volume.
  • All three configurations list capacity under normal use conditions, meaning the 6-liter and 7.25-liter figures apply to standard operating environments rather than severe or high-stress duty cycles.

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