Kia Optima, MS (USA / CAN)

Manual transmission fluid capacity & service interval

Kia Optima, MS (USA / CAN) manual transmission fluid capacity is 2,1 liters. Service intervals include checking every 5000 to 7500 miles or 5 to 7 months and changing every 60000 miles or 60 months. The data covers 2 configurations.

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

TypeSpecifications
Optima 2.4 DOHC (USA) (2003-2006)
  • Use: Normal
  • Capacity 2,1 liter
  • Check 7500 miles/ 7 months
  • Code: 5/1
Optima 2.4 DOHC (USA) (2003-2006)
  • Use: Severe
  • Capacity 2,1 liter
  • Check 5000 miles/ 5 months
  • Change 60000 miles/ 60 months
  • Code: 5/1

Additional Notes

  • The Kia Optima 2.4 DOHC (USA) manual transaxle holds 2.1 liters of fluid, a figure that applies to both normal and severe use conditions across the 2003-2006 model years.
  • Under normal use, the 2.4 DOHC manual transaxle is subject to a check interval of 7,500 miles or 7 months, with no separate change interval listed for that condition.
  • Under severe use, the check interval shortens to 5,000 miles or 5 months, reflecting the more demanding operating conditions placed on the transaxle fluid.
  • A fluid change interval of 60,000 miles or 60 months appears exclusively under the severe use condition, making mileage and time equally valid triggers for a fluid replacement in that context.
  • The 2.1-liter capacity figure represents a service fill level, meaning the amount of fluid the transaxle holds during normal operation rather than a total system volume measured during a full overhaul.

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