Buick Regal, E2XX (USA / CAN)

Differential fluid capacity & service interval

Buick Regal E2XX (USA / CAN) differential fluid capacity ranges from 0,35 liter to 0,9 liter. Service intervals include changes at 75000 miles and 150000 miles. The data covers 9 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)
  • Rear
  • Use: Normal
  • Capacity 0,9 liter
  • Change 150000 miles
  • Regal 2.0L Turbo AWD (2017-2020)
  • Rear
  • Use: Severe
  • Capacity 0,9 liter
  • Change 75000 miles
  • Regal 2.0L Turbo AWD (2017-2020)
  • Rear, clutch
  • Use: Normal
  • Capacity 0,35 liter
  • Regal GS 3.6L V6 AWD (2017-2020)
  • Rear
  • Use: Normal
  • Capacity 0,9 liter
  • Change 150000 miles
  • Regal GS 3.6L V6 AWD (2017-2020)
  • Rear
  • Use: Severe
  • Capacity 0,9 liter
  • Change 75000 miles
  • Regal GS 3.6L V6 AWD (2017-2020)
  • Rear, clutch
  • Use: Normal
  • Capacity 0,35 liter
  • Regal TourX 2.0L Turbo AWD (2017-2020)
  • Rear
  • Use: Normal
  • Capacity 0,9 liter
  • Change 150000 miles
  • Regal TourX 2.0L Turbo AWD (2017-2020)
  • Rear
  • Use: Severe
  • Capacity 0,9 liter
  • Change 75000 miles
  • Regal TourX 2.0L Turbo AWD (2017-2020)
  • Rear, clutch
  • Use: Normal
  • Capacity 0,35 liter

Additional Notes

  • The rear differential capacity across all three AWD configurations — the Regal 2.0L Turbo, the Regal GS 3.6L V6, and the Regal TourX 2.0L Turbo — is uniformly specified at 0.9 liter for the 2017-2020 model years.
  • A separate rear differential clutch fill capacity of 0.35 liter is listed alongside the main 0.9-liter differential capacity, indicating two distinct fluid volumes within the rear drive unit that are serviced independently.
  • Under normal use conditions, the rear differential fluid change interval for all three AWD configurations is 150,000 miles.
  • Under severe use conditions, the rear differential change interval is reduced to 75,000 miles across all three AWD configurations — exactly half the normal-use interval.
  • The rear differential clutch capacity of 0.35 liter carries no associated change interval in the specifications, while the main 0.9-liter differential fill does carry both normal and severe intervals.
  • The Buick Regal GS 3.6L V6 AWD shares identical rear differential capacity and service interval figures with the 2.0L Turbo variants, despite the difference in engine displacement and configuration.
  • The 0.9-liter rear differential capacity is consistent across the Regal Sportback and the Regal TourX wagon body styles, reflecting a shared rear drive unit specification between the two body styles for 2017-2020.

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