Buick Regal, E2XX (USA / CAN)

Coolant capacity & service interval

Buick Regal, E2XX (USA / CAN) coolant capacity ranges from 5 to 7,2 liters. Service intervals include checking at 7500 miles or 12 months and changing at 150000 miles or 60 months. The data covers 4 configurations.

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

TypeSpecifications
Regal 2.0L Turbo AWD (2017-2020)
  • Use: Normal
  • Capacity 5 liter
  • Check 7500 miles/ 12 months
  • Change 150000 miles/ 60 months
Regal 2.0L Turbo FWD (2017-2020)
  • Use: Normal
  • Capacity 5 liter
  • Check 7500 miles/ 12 months
  • Change 150000 miles/ 60 months
Regal GS 3.6L V6 AWD (2017-2020)
  • Use: Normal
  • Capacity 7,2 liter
  • Check 7500 miles/ 12 months
  • Change 150000 miles/ 60 months
Regal TourX 2.0L Turbo AWD (2017-2020)
  • Use: Normal
  • Capacity 5 liter
  • Check 7500 miles/ 12 months
  • Change 150000 miles/ 60 months

Additional Notes

  • The Buick Regal, E2XX (USA / CAN) cooling system capacity splits into two distinct values across the 2017-2020 lineup. The 2.0L Turbo configurations, covering the standard FWD, AWD, and TourX AWD variants, each hold 5 liters. The Regal GS 3.6L V6 AWD requires 7.2 liters, a difference of 2.2 liters that reflects the greater coolant volume demanded by a larger displacement six-cylinder engine and its associated cooling circuit.
  • The 5-liter capacity shared by the 2.0L Turbo FWD, AWD, and TourX AWD variants indicates a consistent cooling system architecture across those three configurations despite their differing drivetrain layouts.
  • The Regal GS 3.6L V6 AWD carries the highest cooling system capacity in the lineup at 7.2 liters, which is consistent with the larger thermal load generated by a 3.6-liter V6 engine compared to a 2.0-liter turbocharged four-cylinder.
  • Across all four configurations spanning 2017-2020, the coolant check interval is set at 7,500 miles or 12 months under normal use conditions, whichever comes first.
  • The coolant change interval is identical across all four configurations at 150,000 miles or 60 months under normal use conditions. A 60-month interval corresponds to five years of service before a full coolant replacement is due.
  • The 150,000-mile change interval is notably long and is characteristic of modern extended-life coolant formulations, which are engineered to maintain corrosion inhibitor effectiveness well beyond the shorter intervals associated with older coolant types.

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