Kia Optima Fluid Capacities: A Comprehensive Guide for 2015-2024 Models
The Kia Optima, also known as the K5 in some markets, has undergone significant changes over the years, particularly in its powertrain options. This guide focuses on the fluid capacities and specifications for the latest two generations of the Kia Optima, covering models from 2015 to 2024. We’ll explore the various engine and transmission combinations, their respective fluid capacities, and recommended maintenance schedules. Whether you’re a Kia Optima owner, a mechanic, or simply an automotive enthusiast, this comprehensive overview will provide valuable insights into the fluid requirements of these popular midsize sedans. From engine oil to transmission fluid, coolant to brake fluid, we’ve compiled all the essential information to keep your Kia Optima running smoothly and efficiently.
Fourth Generation Kia Optima (2015-2020)
The fourth-generation Kia Optima, also known as the JF model, was produced from 2015 to 2020. This generation offered a range of engine and transmission options, catering to various markets and consumer preferences.
Engine Options
Engine Model | Displacement | Power Output | Engine Oil Capacity | Engine Oil Specification |
---|---|---|---|---|
G4KJ (Theta II) | 2.4L | 185 hp | 4.8L (5.07 US qt) | 5W-30, API SN PLUS, ILSAC GF-5 |
G4KH (Theta II Turbo) | 2.0L Turbo | 245 hp | 4.8L (5.07 US qt) | 5W-30, API SN PLUS, ILSAC GF-5 |
G4FJ (Gamma II) | 1.6L Turbo | 178 hp | 3.8L (4.02 US qt) | 5W-30, API SN PLUS, ILSAC GF-5 |
D4FD (U2) | 1.7L Diesel | 141 hp | 4.5L (4.76 US qt) | 5W-30, ACEA C3 |
Transmission Options
Transmission Model | Type | ATF Capacity | ATF Specification |
---|---|---|---|
A6MF1 | 6-speed automatic | 7.1L (7.5 US qt) | SP-IV |
A6LF2 | 6-speed automatic | 7.8L (8.24 US qt) | SP-IV |
7DCT | 7-speed dual-clutch | 1.9L (2.01 US qt) | 7DCT |
M6CF1 | 6-speed manual | 1.8L (1.9 US qt) | API GL-4, SAE 75W/85 |
Fifth Generation Kia K5/Optima (2020-2024)
The fifth-generation Kia Optima, renamed K5 in many markets, was introduced in 2020 and is still in production as of 2024. This generation brought significant updates to the powertrain options.
Engine Options
Engine Model | Displacement | Power Output | Engine Oil Capacity | Engine Oil Specification |
---|---|---|---|---|
G4NJ (Smartstream) | 2.5L | 191 hp | 5.8L (6.13 US qt) | 0W-30, API SN PLUS, ILSAC GF-6 |
G4KP (Smartstream) | 2.5L Turbo | 290 hp | 5.8L (6.13 US qt) | 0W-30, API SN PLUS, ILSAC GF-6 |
G4FL (Smartstream) | 1.6L Turbo | 180 hp | 4.8L (5.07 US qt) | 0W-30, API SN PLUS, ILSAC GF-6 |
Transmission Options
Transmission Model | Type | ATF Capacity | ATF Specification |
---|---|---|---|
A8LF1 | 8-speed automatic | 9.2L (9.72 US qt) | SP-IV-RR |
8DCT | 8-speed dual-clutch | 2.2L (2.32 US qt) | SP-IV-RR |
Other Fluid Capacities
Fluid Type | Capacity | Specification |
---|---|---|
Coolant | 7.5L (7.93 US qt) | Phosphate-based coolant |
Brake Fluid | 0.7-0.8L (0.74-0.85 US qt) | DOT-4 |
Power Steering Fluid | 1.0L (1.06 US qt) | PSF-4 |
Washer Fluid | 4.5L (4.76 US qt) | – |
Maintenance Schedule
To ensure optimal performance and longevity of your Kia Optima/K5, follow this general maintenance schedule:
- Engine Oil and Filter: Change every 7,500 miles (12,000 km) or 12 months, whichever comes first
- Automatic Transmission Fluid: Inspect every 30,000 miles (48,000 km), replace if necessary
- Manual Transmission Fluid: Inspect every 40,000 miles (64,000 km), replace if necessary
- Coolant: First replacement at 120,000 miles (192,000 km) or 10 years, then every 30,000 miles (48,000 km) or 2 years
- Brake Fluid: Replace every 2 years
- Air Filter: Replace every 30,000 miles (48,000 km)
- Spark Plugs: Replace every 100,000 miles (160,000 km)
Always consult your vehicle’s owner’s manual for specific maintenance intervals, as they may vary depending on driving conditions and regional requirements.
Word from Sir Erwin
As an automotive enthusiast and expert, I cannot stress enough the importance of proper fluid maintenance in your Kia Optima or K5. Regular checks and timely replacements of engine oil, transmission fluid, coolant, and other vital fluids are crucial for the longevity and performance of your vehicle. Always use the recommended fluid specifications and adhere to the maintenance schedule provided by Kia. By doing so, you’ll ensure that your Optima continues to deliver the reliability and driving pleasure it’s known for, mile after mile.
Remember, while this guide provides general information, it’s always best to consult your vehicle’s specific manual or a certified Kia technician for the most accurate and up-to-date recommendations tailored to your particular model and year. Happy driving, and may your Kia Optima serve you well for years to come!
Citations
[1] Kia K5 – Wikipedia
[2] Kia Optima – Ultimate Specs
[3] Kia Optima – Auto Data
[4] Kia Optima IV 2.0 CVVL – Auto Data