Oldsmobile Cutlass Supreme (USA / CAN)

Coolant capacity & service interval

Oldsmobile Cutlass Supreme (USA / CAN) coolant capacity ranges from 11,25 to 12,4 liters. Service intervals include checking every 6 months and changing at 30000 miles/24 months or 150000 miles/60 months. The data covers 3 configurations.

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

TypeSpecifications
Cutlass Supreme 3.1 V6 (1994-1997)
  • Use: Normal
  • Capacity 12,4 liter
  • Check 6 months
  • Change 150000 miles/ 60 months
Cutlass Supreme 3.1 V6 (1989-1993)
  • Use: Normal
  • Capacity 11,25-12 liter
  • Change 30000 miles/ 24 months
Cutlass Supreme 2.8 V6 (1988-1989)
  • Use: Normal
  • Capacity 11,25-12 liter

Additional Notes

  • The Oldsmobile Cutlass Supreme 2.8 V6 (1988-1989) cooling system holds between 11.25 and 12 liters, a range that reflects variation depending on whether the heater circuit and reservoir are included in the fill measurement.
  • The 3.1 V6 (1989-1993) shares the same 11.25-12 liter capacity range as the earlier 2.8 V6, despite being a different engine displacement.
  • Moving to the 3.1 V6 (1994-1997), the cooling system capacity rises to a fixed 12.4 liters, a slight increase over the variable range specified for the earlier engine generations.
  • The 3.1 V6 (1989-1993) carries a coolant change interval of 30,000 miles or 24 months under normal use conditions, whichever comes first.
  • For the 3.1 V6 (1994-1997), the coolant change interval extends substantially to 150,000 miles or 60 months under normal use conditions, a figure consistent with long-life or extended-service coolant formulations that became more common in mid-1990s GM vehicles.
  • Alongside the change interval, the 3.1 V6 (1994-1997) specifications also include a coolant check interval of every 6 months, which is a separate maintenance action from the full drain-and-fill service.
  • No coolant change interval is listed for the 2.8 V6 (1988-1989), as the specifications for that configuration contain only a capacity value.

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