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.
Need these specs on your phone? Download OilFinderPro app for offline access and oil change reminders.
Last verified: 2026-03-05 | Source: 2023 Kia Soul Owner’s Manual & Service Bulletins