Audi A8, S8, 4D (USA)

Differential fluid capacity & service interval

Audi A8, S8, 4D (USA) differential fluid capacity ranges from 0,75 to 1,5 liters. Service intervals require a check every 15000 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
  • S8 4.2 V8 40V quattro (265 kW) (2000-2002)
  • From automatic
  • Use: Normal
  • Capacity 0,75 liter
  • Check 15000 miles/ 24 months
  • A8 4.2 V8 32V quattro (228 kW) (1999-2002)
  • From automatic
  • Use: Normal
  • Capacity 0,75 liter
  • Check 15000 miles/ 24 months
  • A8 3.7 V8 32V (169 kW) (1997-1998)
  • From automatic
  • Use: Normal
  • Capacity 0,75 liter
  • Check 15000 miles/ 24 months
  • A8 3.7 V8 32V quattro (169 kW) (1997-1999)
  • From automatic
  • Use: Normal
  • Capacity 0,75 liter
  • Check 15000 miles/ 24 months
  • A8 3.7 V8 32V quattro (169 kW) (1997-1999)
  • Rear
  • Use: Normal
  • Capacity 1,5 liter
  • Check 15000 miles/ 24 months

Additional Notes

  • The Audi A8, S8, 4D (USA) differential sourced from the automatic transmission holds 0.75 liter across all listed configurations, covering the 3.7 V8 32V, 4.2 V8 32V quattro, and S8 4.2 V8 40V quattro variants.
  • The rear differential on the A8 3.7 V8 32V quattro (169 kW) from 1997-1999 carries a notably larger capacity of 1.5 liters, exactly double the 0.75 liter figure associated with the automatic-sourced differential on the same vehicle.
  • The distinction between the automatic-sourced differential and the rear differential on the 1997-1999 A8 3.7 V8 32V quattro means two separate fluid fills are required, totaling 2.25 liters across both units combined.
  • All five rows share an identical check interval of every 15,000 miles or 24 months under normal use conditions, applying uniformly across the 3.7 V8, 4.2 V8 32V, and 4.2 V8 40V engine variants.
  • The non-quattro A8 3.7 V8 32V (169 kW) from 1997-1998 lists only the automatic-sourced differential at 0.75 liter, reflecting the absence of a rear differential unit in a front-wheel-drive or single-axle-driven layout.
  • The S8 4.2 V8 40V quattro (265 kW), covering 2000-2002, shares the same 0.75 liter automatic-sourced differential capacity and 15,000-mile check interval as the lower-output A8 variants, despite a substantially higher power output of 265 kW versus 228 kW.

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