Audi A8L, S8L, 4N / 4NL (USA)

Automatic transmission fluid capacity & service interval

Audi A8L, S8L, 4N / 4NL (USA) automatic transmission fluid capacity ranges from 3,6 to 8,6 liters. Service intervals require a check every 20000 miles or 24 months. The data covers 5 configurations.

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

TypeSpecifications
S8L 4.0 TFSI quattro (420 kW) (2022- )
  • Use: Normal
  • Capacity 8,6 liter (Initial fill)
  • Capacity 3,6-4 liter (Refill)
  • Check 20000 miles/ 24 months
  • Code: 0D6 8/1
A8L 60 TFSI e quattro (330 kW) (2019-2022)
  • Use: Normal
  • Capacity 8,6 liter (Initial fill)
  • Capacity 3,6-4 liter (Refill)
  • Check 20000 miles/ 24 months
  • Code: 0DY 8/1
A8L 55 TFSI quattro (250 kW) (2018- )
  • Use: Normal
  • Capacity 8,6 liter (Initial fill)
  • Capacity 3,6-4 liter (Refill)
  • Check 20000 miles/ 24 months
  • Code: 0D5 8/1
A8L 60 TFSI quattro (337 kW) (2018-2022)
  • Use: Normal
  • Capacity 8,6 liter (Initial fill)
  • Capacity 3,6-4 liter (Refill)
  • Check 20000 miles/ 24 months
  • Code: 0D5 8/1
S8L 4.0 TFSI quattro (420 kW) (2018-2022)
  • Use: Normal
  • Capacity 8,6 liter (Initial fill)
  • Capacity 3,6-4 liter (Refill)
  • Check 20000 miles/ 24 months
  • Code: 0D6 8/1

Additional Notes

  • The Audi A8L 55 TFSI quattro automatic transmission carries an initial fill capacity of 8.6 liters, a figure that reflects the total fluid volume required when filling a dry transmission from an overhaul or replacement, rather than a routine service top-up.
  • Refill capacity across all listed configurations is specified as a range of 3.6 to 4 liters, which accounts for the variable amount of fluid retained in the torque converter and valve body during a partial drain service.
  • The gap between the 8.6-liter initial fill and the 3.6-to-4-liter refill range indicates that a significant portion of fluid remains trapped in the transmission assembly during a standard drain, making a full fluid exchange procedure necessary to approach the initial fill volume.
  • The check interval for automatic transmission fluid is set at 20,000 miles or 24 months under normal use conditions across every configuration in the specifications, including the A8L 60 TFSI e quattro (330 kW) plug-in hybrid variant.
  • The A8L 60 TFSI e quattro (330 kW) shares the identical 8.6-liter initial fill, 3.6-to-4-liter refill, and 20,000-mile/24-month check interval as the non-hybrid A8L and S8L variants, despite the added complexity of a hybrid drivetrain.
  • The S8L 4.0 TFSI quattro (420 kW) appears under two separate year range entries, 2018-2022 and a second entry starting from 2022, both carrying the same 8.6-liter initial fill, 3.6-to-4-liter refill, and 20,000-mile/24-month check specification.
  • All five configurations across the A8L and S8L lineup share uniform automatic transmission fluid capacities and service check intervals, with no variation tied to engine output, which ranges from 250 kW in the A8L 55 TFSI to 420 kW in the S8L 4.0 TFSI.

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