Audi A8, S8, 4D (USA)

Coolant capacity & service interval

Audi A8, S8, 4D (USA) models utilize coolant with a capacity of 9 liters. Service intervals include checks at 7500 miles or 12 months and 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)
  • Use: Normal
  • Capacity 9 liter
  • Check 15000 miles/ 24 months
A8 4.2 V8 32V quattro (228 kW) (1999-2002)
  • Use: Normal
  • Capacity 9 liter
  • Check 7500 miles/ 12 months
A8 3.7 V8 32V (169 kW) (1997-1998)
  • Use: Normal
  • Filter capacity 9 liter
  • Check 7500 miles/ 12 months
A8 3.7 V8 32V quattro (169 kW) (1997-1999)
  • Use: Normal
  • Filter capacity 9 liter
  • Check 7500 miles/ 12 months
A8 4.2 V8 40V quattro (220 kW) (1997-1999)
  • Use: Normal
  • Capacity 9 liter

Additional Notes

  • The Audi A8, S8, 4D (USA) coolant system capacity of 9 liters applies uniformly across all listed configurations, from the 3.7 V8 32V to the S8 4.2 V8 40V quattro, indicating a consistent cooling system volume regardless of engine output or drivetrain layout.
  • A filter capacity value, as noted for the A8 3.7 V8 32V (169 kW) covering 1997-1998 and the A8 3.7 V8 32V quattro (169 kW) covering 1997-1999, typically refers to the amount of fluid required when servicing the system with a filter replacement rather than a full drain, meaning the actual total system volume may differ from what is filled during a standard service.
  • The A8 4.2 V8 32V quattro (228 kW) covering 1999-2002 and the A8 4.2 V8 40V quattro (220 kW) covering 1997-1999 list a straight capacity value of 9 liters without the filter capacity designation, distinguishing the fill specification from the filter-specific figures noted on the 3.7 V8 variants.
  • The A8 3.7 V8 32V (169 kW) and the A8 3.7 V8 32V quattro (169 kW) both carry a coolant check interval of 7,500 miles or 12 months under normal use conditions, placing the service frequency on an annual or mileage-based cycle, whichever comes first.
  • The S8 4.2 V8 40V quattro (265 kW) covering 2000-2002 carries a coolant check interval of 15,000 miles or 24 months under normal use conditions, which is double the mileage and time interval specified for the 3.7 V8 32V variants despite sharing the same 9-liter capacity.
  • The A8 4.2 V8 40V quattro (220 kW) covering 1997-1999 lists only a capacity value with no check interval specified in the row data, setting it apart from the other configurations where interval information is present.

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