Acura RLX (USA / CAN)

Additional Notes

• The Acura RLX (USA / CAN) coolant service intervals across all listed configurations are governed by a flexible schedule tied to the on-board maintenance system, meaning the vehicle's own monitoring determines when a coolant service is due rather than a fixed mileage or time interval.
• All capacity figures in the specifications are designated as service fill values, which represent the amount of coolant added during a routine drain-and-refill procedure rather than a full system overhaul capacity.
• The Canadian-market RLX 3.5 i-VTEC V6 carries a service fill capacity of 8 liters for model years 2013-2020, while the USA-market equivalent is rated at 8.1 liters for the same period, reflecting a small but distinct regional difference in cooling system capacity.
• Both the Canadian and USA versions of the RLX 3.5 i-VTEC V6 Hybrid share an identical main cooling system service fill capacity of 7.9 liters for 2015-2020, which is slightly lower than the non-hybrid V6 figures in both markets.
• The hybrid variants of the RLX 3.5 i-VTEC V6 for 2015-2020 include a separate inverter cooling circuit with a capacity of 1.23 liters, a secondary loop dedicated to managing heat generated by the hybrid powertrain's power electronics.
• The inverter cooling circuit capacity of 1.23 liters is identical across both the Canadian and USA hybrid configurations for 2015-2020, indicating no regional variation in the hybrid-specific cooling subsystem.
• The non-hybrid RLX 3.5 i-VTEC V6 does not carry an inverter cooling circuit entry in the specifications, as that secondary loop is exclusive to the hybrid powertrain configurations introduced for 2015-2020.