Complete Oil Specifications
Your 2023 Kia Soul 2.0L Nu MPI requires 0W-20 full synthetic engine oil meeting API SP and ILSAC GF-6A standards.
Quick Reference
| Specification | Value |
|---|---|
| Viscosity | 0W-20 |
| API Rating | API SP |
| ILSAC Rating | GF-6A |
| Capacity (with filter) | 4.2 quarts |
| Oil Filter | Kia 26300-35504 or 26350-2J000 |
| Normal Interval | 8000 miles |
Why 0W-20 is Critical for the 2.0L Nu MPI
Kia optimized the Nu-series multi-port injection engine alongside Hyundai to rely exclusively on ultra-thin 0W-20 synthetic mechanics. A critical upgrade over earlier generations was replacing standard hydraulic tensioners with precisely tuned oil-pressurized Variable Valve Timing (VVT) phasers. The ultra-low cold viscosity curve of 0W-20 enables exactly this precise timing.
Using heavy oil like 5W-30 or 10W-30 will:
- ❌ Induce sluggish operation of the Dual VVT mechanics upon starting.
- ❌ Create cold-start engine rattling.
- ❌ Risk inadequate lubrication to the upper camshaft valvetrain, leading to premature wear.
Kia-Approved Oil Brands
-
✅ Kia Genuine Quaker State Full Synthetic 0W-20
-
✅ Mobil 1 Advanced Full Synthetic 0W-20
-
✅ Valvoline Advanced Full Synthetic 0W-20
-
✅ Pennzoil Platinum Full Synthetic 0W-20
-
✅ Castrol Edge Full Synthetic 0W-20
Kia technically endorses Quaker State synthetics out of the factory, but any reputable brand displaying the API “Starburst” certification mark specifically ensuring conformity with ILSAC GF-6A standards complies with Kia’s 10-year/100,000-mile warranty.
Severe Service Check
Kia strictly expects a reduced 5000-mile interval if you:
- Engage in repeated exceedingly short trips (under 5 miles in town)
- Extensively idle or crawl at low speeds in heavy traffic
- Drive predominantly on rough, dusty, or unpaved dirt surfaces
- Constantly apply brakes in heavy metropolitan grids
- Navigate steep incline geography actively
Installation Details
Drain Plug Torque: 29 ft-lbs
Remember to remove the old crush washer before applying the new aluminum replacement gasket to avoid double-gasketing leaks.
OEM Filter: Kia 26300-35504 or 26350-2J000
Aftermarket Filters:
-
Mobil 1 M1-108A
-
K&N HP-1008
-
WIX WL10521
Pro Tip: Depending on exact production dates, some 2.0L Nu engines utilize a legacy metal spin-on filter (26300-35504), while others transition to an eco-friendly cartridge housing unit (26350-2J000) located beneath a plastic cap under the splash shield. Confirm your hardware setup under the vehicle before purchasing the filter.
FAQs
What oil does a 2023 Kia Soul 2.0L take?
Full synthetic 0W-20 oil meeting API SP certification. Check labels explicitly.
How many quarts does it need?
4.2 quarts alongside a fresh oil filter swap.
Can I use generic 5W-20 or 5W-30 instead?
No. Kia definitively mandates 0W-20 for the lifespan of the Nu 2.0 engine series. Thicker viscosities ruin VVT actuations and harm fuel economy.
Is synthetic oil required?
Yes. True 0W-20 formulas only exist natively via synthetic construction.
How often should I change the oil?
Every 8000 miles, or every 12 months for normal driving. Fall back to 5000 miles if you idle extensively.
Last verified: 2026-03-05 | Source: 2023 Kia Soul Owner’s Manual & Service Bulletins