Opel Commodore C
Coolant capacity & service interval
The Opel Commodore C uses coolant with a capacity range of 9.6-9.8 liters. The data covers 2 configurations of the model.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| Commodore 2.5 E (1977-1982) |
|
| Commodore 2.5 S (1977-1982) |
|
Additional Notes
- The Opel Commodore C carries a coolant capacity of 9.6 to 9.8 liters across the 2.5 E and 2.5 S variants for the 1977-1982 model years.
- The 0.2-liter spread in the stated capacity range is typical of cooling system fills, where the final volume depends on how completely air pockets are purged during the refill process.
- Both the 2.5 E and 2.5 S share an identical capacity specification, indicating no meaningful difference in cooling system volume between the two trim levels despite their distinct engine tuning designations.
- The capacity figures apply under normal use conditions, meaning the 9.6 to 9.8-liter range reflects standard operating requirements rather than a modified or severe-duty scenario.