Jaguar XJS, XJ27 (EU)
Coolant capacity & service interval
Jaguar XJS and XJ27 (EU) models utilize coolant with capacities ranging from 9,9 to 19,8 liters. Service intervals require changes every 48000 km or 24 months. The data covers 4 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| XJS 4.0 (1995-1997) |
|
| XJS 6.0 V12 (1995-1997) |
|
| XJS 4.0 (1991-1994) |
|
| XJS 6.0 V12 (1991-1994) |
|
Additional Notes
- The Jaguar XJS, XJ27 (EU) 4.0 engine carries a service fill capacity of 9.9 liters across both the 1991-1994 and 1995-1997 model year ranges.
- The 1991-1994 XJS 4.0 lists a separate initial fill capacity of 11.6 liters, which is higher than the 9.9-liter service fill. An initial fill accounts for a dry system where all passages, hoses, and the heater core are empty, requiring more fluid than a standard drain-and-refill service.
- The 1995-1997 XJS 4.0 does not carry a separate initial fill figure, listing only the 9.9-liter capacity.
- The XJS 6.0 V12 cooling system holds 19.8 liters, a capacity roughly double that of the 4.0 inline-six. A V12 engine has a substantially larger block, more cylinder head surface area, and a greater number of coolant passages, all of which contribute to a significantly higher system volume.
- The 19.8-liter capacity for the 6.0 V12 remains unchanged across both the 1991-1994 and 1995-1997 model year ranges.
- All four configurations share an identical service interval of 48,000 km or 24 months under normal use conditions, whichever comes first. The time-based limit of 24 months reflects the chemical degradation of coolant additives over time, independent of distance traveled.