Jeep Gladiator, JT (USA / CAN)

Coolant capacity & service interval

Jeep Gladiator, JT (USA / CAN) coolant capacity ranges from 11,4 to 12,3 liters. The service interval is 150000 miles or 120 months. The data covers 2 configurations.

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

TypeSpecifications
Gladiator 3.0 Diesel (2019-2023)
  • Use: Normal
  • Capacity 11,4 liter
  • Change 150000 miles/ 120 months
Gladiator 3.6 (2019- )
  • Use: Normal
  • Capacity 12,3 liter
  • Change 150000 miles/ 120 months

Additional Notes

  • The Jeep Gladiator JT's 3.6-liter petrol engine carries a cooling system capacity of 12.3 liters, while the 3.0-liter diesel variant holds 11.4 liters, a difference of 0.9 liters between the two engine configurations.
  • Both engine variants share an identical service interval of 150,000 miles or 120 months, whichever comes first, under normal use conditions.
  • A 120-month interval translates to a 10-year coolant change cycle, which is consistent with modern extended-life coolant formulations designed to resist degradation over long service periods.
  • The 11.4-liter capacity recorded for the 3.0-liter diesel reflects a full cooling system service fill, meaning the figure accounts for the total volume of coolant the system holds during normal operation rather than a partial drain-and-refill quantity.
  • The 12.3-liter figure for the 3.6-liter petrol engine similarly represents a full system capacity, indicating a relatively large cooling circuit typical of engines paired with auxiliary systems such as transmission or oil coolers integrated into the coolant loop.

Other Systems