Oldsmobile Eighty Eight (USA / CAN)

Automatic transmission fluid capacity & service interval

Oldsmobile Eighty Eight (USA / CAN) requires automatic transmission fluid with a capacity range of 5,6 to 10,4 liters. Service intervals include changes at 50000 miles and 100000 miles. The data covers 2 configurations.

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

TypeSpecifications
Eighty Eight 3.8 (1999-1999)
  • Use: Normal
  • Capacity 10,4 liter (Dry fill)
  • Capacity 5,6 liter (Service fill)
  • Change 100000 miles
  • Code: 4/1
Eighty Eight 3.8 (1999-1999)
  • Use: Severe
  • Capacity 10,4 liter (Dry fill)
  • Capacity 5,6 liter (Service fill)
  • Change 50000 miles
  • Code: 4/1

Additional Notes

  • The Oldsmobile Eighty Eight 3.8 automatic transaxle carries a dry fill capacity of 10.4 liters, a figure that reflects the total fluid volume required when filling a completely drained or rebuilt unit, including the torque converter and all internal passages.
  • Service fill capacity for the 3.8 automatic transaxle is 5.6 liters, which represents the amount of fluid displaced during a routine drain and refill, where residual fluid remains in the torque converter and valve body.
  • The gap between the 10.4-liter dry fill and the 5.6-liter service fill indicates that roughly 4.8 liters of fluid is retained in the transaxle during a standard service, a common characteristic of automatic transmissions without a full drain plug on the torque converter.
  • Under normal use conditions, the 1999 Eighty Eight 3.8 automatic transaxle carries a fluid change interval of 100,000 miles.
  • Under severe use conditions, the same transaxle requires a fluid change at 50,000 miles, half the interval specified for normal use, reflecting the accelerated fluid degradation associated with more demanding operating environments such as frequent towing, stop-and-go driving, or extreme temperatures.

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