Kia Optima, MG (USA / CAN)

Manual transmission fluid capacity & service interval

Kia Optima and MG (USA / CAN) manual transmission fluid capacity ranges from 1,75 to 1,9 liters. Service intervals include checks at 6000, 15000, and 30000 miles, and changes at 36000 and 60000 miles. The data covers 4 configurations.

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

TypeSpecifications
Optima 2.4 DOHC (USA) (2008-2010)
  • Use: Normal
  • Capacity 1,75 liter
  • Check 30000 miles/ 24 months
  • Code: 5/1
Optima 2.4 DOHC (USA) (2008-2010)
  • Use: Severe
  • Capacity 1,75 liter
  • Check 30000 miles/ 24 months
  • Change 60000 miles
  • Code: 5/1
Optima 2.4 DOHC (USA) (2006-2008)
  • Use: Normal
  • Capacity 1,9 liter
  • Check 15000 miles/ 12 months
  • Code: 5/1
Optima 2.4 DOHC (USA) (2006-2008)
  • Use: Severe
  • Capacity 1,9 liter
  • Check 6000 miles/ 6 months
  • Change 36000 miles/ 36 months
  • Code: 5/1

Additional Notes

  • The Kia Optima 2.4 DOHC (USA) manual transaxle carries a capacity of 1.9 liters for the 2006-2008 model years, while the 2008-2010 variant of the same engine specifies a reduced capacity of 1.75 liters, reflecting a measurable difference between the two generations of the same drivetrain configuration.
  • For the 2006-2008 2.4 DOHC manual transaxle under normal use conditions, the specification calls for a fluid check at 15,000 miles or 12 months, with no separate change interval listed for that condition.
  • Under severe use conditions for the 2006-2008 2.4 DOHC manual transaxle, the check interval tightens considerably to 6,000 miles or 6 months, and a fluid change is specified at 36,000 miles or 36 months.
  • The 2008-2010 2.4 DOHC manual transaxle applies the same check interval of 30,000 miles or 24 months to both normal and severe use conditions, a notable departure from the earlier generation where the two use conditions carried distinctly different check schedules.
  • Under severe use conditions for the 2008-2010 2.4 DOHC manual transaxle, a fluid change is specified at 60,000 miles with no accompanying month-based limit, whereas the 2006-2008 severe interval expressed the change interval in both miles and months.

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