Honda CRX II, ED8, ED9 (USA / CAN)

Coolant capacity & service interval

Honda CRX II, ED8, ED9 (USA / CAN) coolant capacity ranges from 5,3 to 5,7 liters. Service intervals include 30000 miles or 24 months and 45000 miles or 36 months. The data covers 6 configurations.

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

TypeSpecifications
CRX II 1.5 (1988-1991)
  • Use: Normal
  • Capacity 5,5-5,7 liter
  • Change 30000 miles/ 24 months
CRX II 1.5 (1988-1991)
  • Use: First change only
  • Capacity 5,5-5,7 liter
  • Change 45000 miles/ 36 months
CRX II 1.5 HF (1988-1991)
  • Use: Normal
  • Capacity 5,3 liter
  • Change 30000 miles/ 24 months
CRX II 1.5 HF (1988-1991)
  • Use: First change only
  • Capacity 5,3 liter
  • Change 45000 miles/ 36 months
CRX II 1.6 Si (1988-1991)
  • Use: Normal
  • Capacity 5,4 liter
  • Change 30000 miles/ 24 months
CRX II 1.6 Si (1988-1991)
  • Use: First change only
  • Capacity 5,4 liter
  • Change 45000 miles/ 36 months

Additional Notes

  • The Honda CRX II ED8/ED9 cooling system capacities differ across trim levels, ranging from 5.3 liters in the 1.5 HF to 5.4 liters in the 1.6 Si and 5.5-5.7 liters in the standard 1.5, reflecting differences in engine displacement and cooling circuit volume between configurations.
  • The 1.5 HF carries the smallest coolant capacity at 5.3 liters, a fixed single value, while the standard 1.5 is specified with a capacity range of 5.5-5.7 liters, indicating some variation in fill volume depending on conditions such as residual fluid retention during a service fill.
  • Under normal use conditions, all three trim variants share the same coolant change interval of 30,000 miles or 24 months, whichever comes first, applying equally to the 1.5, 1.5 HF, and 1.6 Si across the 1988-1991 model years.
  • A separate first-change-only interval of 45,000 miles or 36 months is specified for all three trims, meaning the initial factory coolant fill is permitted to remain in service longer before the first scheduled replacement than subsequent refills would be.
  • The 12,000-mile and 12-month extension granted under the first-change-only interval, compared to the normal interval, applies uniformly across the 1.5, 1.5 HF, and 1.6 Si, with no variation in that extended interval between trims.
  • The 1.6 Si cooling system capacity of 5.4 liters falls between the 1.5 HF at 5.3 liters and the upper end of the standard 1.5 range at 5.7 liters, placing the larger-displacement Si engine at a mid-range fill volume rather than the highest of the three configurations.

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