MG Midget

Manual transmission fluid capacity & service interval

MG Midget manual transmission fluid capacity ranges from 0,85 to 1,3 liters. Service intervals include 6000 miles, 9600 km, 10000 km, and 6 months. The data covers 6 configurations.

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

TypeSpecifications
Midget MK III 1500 (1977-1979)
  • Use: Normal
  • Capacity 0,85 liter
  • Check 10000 km/ 6 months
  • Code: 4/1
Midget MK III 1500 (1974-1977)
  • Use: Normal
  • Capacity 0,85 liter
  • Check 10000 km/ 6 months
  • Code: 4/1
Midget MK III (1970-1974)
  • Use: Normal
  • Capacity 1,3 liter
  • Check 6000 miles/ 6 months
  • Code: 4/1
Midget MK III (1966-1969)
  • Use: Normal
  • Capacity 1,3 liter
  • Check 6000 miles/ 9600 km
  • Code: 4/1
Midget MK II 1100 (1963-1966)
  • Use: Normal
  • Capacity 1,3 liter
  • Change 6000 miles/ 9600 km
  • Code: 4/1
Midget MK I (1962-1963)
  • Use: Normal
  • Capacity 1,3 liter
  • Change 6000 miles/ 9600 km
  • Code: 4/1

Additional Notes

  • The MG Midget manual transmission capacity holds at 1.3 liters across the MK I, MK II 1100, and both MK III non-1500 variants covering 1962-1974, reflecting a consistent gearbox design shared across those generations.
  • With the introduction of the 1500 engine in the MK III 1500 for 1974-1979, the manual transmission fluid capacity drops to 0.85 liter, a reduction of roughly 35% compared to earlier variants, indicating a physically smaller or differently designed gearbox unit.
  • The MK I (1962-1963) and MK II 1100 (1963-1966) specifications call for a fluid change at 6,000 miles (9,600 km) under normal use, meaning old fluid is drained and replaced rather than simply inspected.
  • Starting with the MK III (1966-1969), the service action shifts from a fluid change to a fluid check at the same 6,000-mile (9,600 km) interval. A check interval means the fluid level is inspected and topped up as needed rather than fully replaced on schedule.
  • The MK III (1970-1974) retains the 6,000-mile check interval but adds a time-based condition of 6 months, whichever comes first. A dual mileage-and-time interval accounts for vehicles that accumulate low mileage, where fluid degradation over time still warrants attention.
  • The MK III 1500 for 1974-1977 and 1977-1979 both specify a check interval of 10,000 km or 6 months. The shift from miles to kilometers in the interval notation reflects a metrication change in how service schedules were published during the mid-to-late 1970s.
  • Across all six configurations, the specified use condition is normal, meaning none of the listed intervals are adjusted for severe-duty operation such as towing, extreme temperatures, or frequent short trips.

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