Mazda Grand Familia/818 (EU)
Coolant capacity & service interval
Mazda Grand Familia/818 (EU) coolant capacity is 7 liters. Service intervals are 40000 km or 24 months. The data covers 2 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| Grand Familia 818 1300, STC (1973-1978) |
|
| Grand Familia 818 1600, SN4 (1973-1978) |
|
Additional Notes
- Both the 1300 STC and 1600 SN4 engine variants share an identical cooling system capacity of 7 liters, indicating a uniform cooling circuit volume across the two displacements in the Mazda Grand Familia/818 (EU) lineup for 1973-1978.
- The 7-liter figure represents a service fill capacity, meaning the volume of coolant required to properly fill the cooling system during a standard service, rather than a full overhaul or dry-fill measurement.
- The coolant change interval is rated at 40,000 km or 24 months, whichever comes first, under normal use conditions, placing the service cycle on a combined distance-and-time basis rather than either criterion alone.
- The 24-month time limit within the normal-use interval reflects the chemical degradation of coolant additives over time, which occurs independently of mileage accumulation.
- The 1300 STC and 1600 SN4 variants carry no differentiation in either capacity or change interval, meaning engine displacement alone does not alter the coolant service schedule across the 1973-1978 model years covered.