Porsche 928 (EU)

Coolant capacity & service interval

Porsche 928 (EU) coolant capacity is 16 liters. The service interval for coolant is 24 months. The data covers 6 configurations.

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

TypeSpecifications
928 GTS (1991-1995)
  • Use: Normal
  • Capacity 16 liter
  • Change 24 months
928 GT (1989-1992)
  • Use: Normal
  • Capacity 16 liter
  • Change 24 months
928 S4 (1986-1992)
  • Use: Normal
  • Capacity 16 liter
  • Change 24 months
928 S (1984-1986)
  • Use: Normal
  • Capacity 16 liter
  • Change 24 months
928 S (1980-1984)
  • Use: Normal
  • Capacity 16 liter
  • Change 24 months
928 (1977-1982)
  • Use: Normal
  • Capacity 16 liter
  • Change 24 months

Additional Notes

  • The Porsche 928 (EU) cooling system holds 16 liters across all listed variants, from the base 928 through to the GTS. A 16-liter capacity is relatively large for a passenger car and reflects the demands of the front-mounted, water-cooled V8 engine used throughout the 928 lineup.
  • The 16-liter figure represents the total cooling system capacity, meaning the full volume of coolant required to fill the system including the radiator, engine block passages, heater core, and expansion tank. A service fill after a routine drain may recover less than the full 16 liters due to residual fluid retained in the block.
  • All six configurations share a 24-month coolant change interval under normal use conditions. A 24-month interval is a calendar-based schedule, meaning the change is due regardless of mileage accumulated within that period.
  • The base 928 (1977-1982) and the 928 S (1980-1984) share overlapping production years, and both carry the same 16-liter capacity and 24-month interval, indicating no cooling system revision accompanied the introduction of the S variant in that period.
  • The 928 S appears across two distinct year ranges, 1980-1984 and 1984-1986, each listed as a separate configuration. Both carry identical cooling system specifications, suggesting the variant designation continued without a change to cooling system volume or service schedule across those periods.
  • The 928 S4 (1986-1992) retains the same 16-liter capacity and 24-month interval as earlier variants despite representing a significant engine revision in the 928 series, with the S4 introducing a revised 32-valve V8. The cooling system volume remained unchanged through that transition.
  • The 928 GT (1989-1992) and 928 GTS (1991-1995) both share the same 16-liter capacity and 24-month service interval as all other listed variants. The GTS represented the final and most powerful production version of the 928, yet the cooling system specifications remained consistent with those of the original 1977-1982 base model.

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