Honda Civic VIII, FA/FD/FG/FK/FN (USA / CAN)

Additional Notes

• The Honda Civic VIII FA/FD/FG/FK/FN automatic transaxle carries an initial fill capacity of 5.9 liters across the 1.8 GX CNG FD1 (2005-2009) and the standard 1.8 FD1 (2005-2010) configurations. An initial fill figure of this size reflects the total fluid volume required when the transaxle is completely dry, such as after a full overhaul or unit replacement.
• The 1.8 FD1 variant covering 2010-2011 carries a slightly reduced initial fill capacity of 5.75 liters, compared to the 5.9-liter figure associated with earlier FD1 production. A difference of 0.15 liters between otherwise similar configurations typically points to a revised internal component or sump geometry introduced during a mid-cycle update.
• All three FD1 configurations share an identical service fill capacity of 2.4 liters. A service fill value represents only the fluid drained during a routine fluid exchange, which is considerably less than the full system volume because a portion of the fluid remains trapped in the torque converter and valve body during a standard drain procedure.
• The ratio between the initial fill and service fill figures across FD1 variants illustrates how much fluid is retained in the transaxle during a routine service. With an initial fill of 5.9 liters and a service fill of 2.4 liters, roughly 3.5 liters remain in the system after a standard drain, meaning a single service exchange replaces less than half the total fluid volume.
• All three rows specify a flexible service interval governed by an on-board maintenance system rather than a fixed mileage or time-based schedule. An on-board maintenance system monitors driving conditions and usage patterns to calculate when a fluid change is due, meaning the interval varies from one vehicle to another depending on actual operating history.