Complete Oil Specifications
Your 2023 Genesis G80 with the 2.5T turbocharged four-cylinder requires 0W-30 full synthetic oil meeting API SN. This is the same G25DT engine architecture found in the GV80 — Genesis specifies 0W-30, not the more common 0W-20, to provide adequate high-temperature film strength at the turbocharged bearings in a performance-oriented luxury sedan.
Quick Reference
| Specification | Value |
|---|---|
| Viscosity | 0W-30 |
| API Rating | API SN |
| ILSAC Rating | GF-5 |
| Capacity (with filter) | 5.6 quarts |
| Capacity (without filter) | 5.3 quarts |
| Oil Filter | Genesis/Hyundai 26300-35505 |
| Normal Interval | 8000 miles |
Why 0W-30 for the G25DT Turbo
The G25DT is a twin-scroll turbocharged engine with dual Continuously Variable Valve Timing (CVVT) on both intake and exhaust cams, high-pressure direct injection, and an integrated exhaust manifold in the cylinder head. Genesis specifies 0W-30 — not the more common 0W-20 used in many competitors — because the higher-viscosity 30-weight base provides better shear stability at the twin-scroll turbocharger shaft, which operates at temperatures well above combustion chamber temperatures.
Using incorrect oil will:
- ❌ Allow the turbocharger shaft film to break down under sustained boost with 0W-20’s lower high-temp viscosity
- ❌ Reduce protection for dual CVVT actuators during cold-start engagement
- ❌ Shorten the 8,000-mile service interval if oil degrades faster from insufficient viscosity margin
Genesis-Approved Oil Brands
-
✅ Genesis Genuine Motor Oil 0W-30
-
✅ Mobil 1 Extended Performance 0W-30
-
✅ Pennzoil Ultra Platinum Full Synthetic 0W-30
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✅ Castrol Edge Full Synthetic 0W-30
-
✅ Shell Helix Ultra 0W-30
Use only oils meeting API SN or higher. The 0W-30 viscosity is non-negotiable — do not substitute 0W-20 or 5W-30, even if they meet the API rating.
Severe Service Check
Use the 4000-mile interval if you:
- Frequently drive in Sport or Sport+ mode with sustained high RPM
- Make primarily short trips under 5 miles in cold conditions
- Drive regularly in stop-and-go urban traffic
- Operate in extreme temperatures or mountain conditions
Installation Details
Drain Plug Torque: 25 ft-lbs
Replace the drain plug aluminum crush washer at every oil change. The G80’s oil pan is aluminum — never exceed the specified torque.
OEM Filter: Genesis/Hyundai 26300-35505
Aftermarket Filters:
-
Mobil 1 M1-110A
-
WIX 51394
-
K&N HP-1010
Pro Tip: The G80’s spin-on oil filter is located on the front-lower section of the engine, accessible from below. Genesis’s Maintenance Reminder System will display a service alert on the instrument cluster when an oil change is due based on driving conditions — follow this system, not a fixed mileage schedule, for optimal engine life.
FAQs
What oil does a 2023 Genesis G80 2.5T take?
0W-30 full synthetic meeting API SN or higher. Do not substitute 0W-20.
How many quarts does the G80 2.5T need?
5.6 quarts with a new filter, 5.3 without.
Can I use 0W-20 instead of 0W-30 in my Genesis G80?
No. Genesis explicitly specifies 0W-30 for the G25DT turbo engine. The 30-weight viscosity is required to protect the twin-scroll turbocharger at sustained operating temperatures.
Why does the G80 use 0W-30 instead of 0W-20 like many other turbocharged cars?
Genesis chose 0W-30 for the G25DT because the twin-scroll turbocharger in the G80 runs hotter under performance driving conditions than typical family-car turbos. The 30-weight base provides greater film thickness reserve at the turbo shaft bearings.
Is full synthetic required?
Yes. Full synthetic is required to achieve the 8,000-mile service interval and maintain API SN standard throughout.
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Last verified: 2026-04-30 | Source: 2023 Genesis G80 Owner’s Manual