Complete Oil Specifications
Kia’s owner’s manual for the 2025 K4 with the Smartstream G2.0 engine calls for full synthetic SAE 0W-20 rated API SN PLUS/SP or ILSAC GF-6. Engine oil drain-and-refill volume is 4.5 US qt (4.3 L).
When to Change the Oil
| Driving | Replace engine oil and filter |
|---|---|
| Normal | Every 8,000 miles (13,000 km) or 12 months |
| Severe usage | Every 5,000 miles (8,000 km) or 6 months |
Kia says the normal interval assumes the recommended engine oil specification. If it isn’t used, follow the severe-usage schedule.
What We Couldn’t Confirm
- Whether 4.5 US qt (4.3 L) includes the filter. Kia labels it “drain and refill”.
- OEM oil filter part number and drain plug torque. Neither appears in the owner’s manual pages used here.
FAQs
What oil does a 2025 Kia K4 2.0L take? Full synthetic SAE 0W-20 rated API SN PLUS/SP or ILSAC GF-6.
How much oil does it take? 4.5 US qt (4.3 L) drain and refill.
How often should I change the oil? Every 8,000 miles (13,000 km) or 12 months normally, or every 5,000 miles (8,000 km) or 6 months under severe usage.