Complete Oil Specifications
Your 2023 Hyundai Santa Cruz equipped with the 2.5L Turbocharged SmartStream (G2.5T) requires 5W-30 full synthetic oil meeting API SP and ILSAC GF-6A standards.
Quick Reference
| Specification | Value |
|---|---|
| Viscosity | 5W-30 |
| API Rating | API SP |
| ILSAC Rating | GF-6A |
| Capacity (with filter) | 5.3 quarts |
| Oil Filter | Hyundai 26300-35505 |
| Normal Interval | 7500 miles |
Why 5W-30 is Critical for This Engine
The G2.5T SmartStream is a turbocharged direct-injection four-cylinder developed specifically for Hyundai’s performance and truck applications, offering 281 horsepower and 311 lb-ft of torque. The 5W-30 specification (heavier than the naturally aspirated 2.5L’s 5W-20 or 0W-20) is deliberate — the higher viscosity maintains the correct oil film thickness on the turbocharger bearings and connecting rod journals under the elevated thermal and mechanical loads of the turbocharged application. Using a lighter 0W-20 risks insufficient film strength when towing or during spirited driving.
Using incorrect oil will:
- ❌ Thin the oil film on turbo bearings under high boost, risking bearing failure
- ❌ Reduce protection on the high-output connecting rod bearings under load
- ❌ Accelerate oil degradation from the turbocharged combustion temperatures
Hyundai-Approved Oil Brands
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✅ Hyundai Genuine Full Synthetic 5W-30
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✅ Mobil 1 Extended Performance 5W-30
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✅ Castrol Edge Extended Performance 5W-30
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✅ Pennzoil Platinum Full Synthetic 5W-30
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✅ Valvoline Advanced Full Synthetic 5W-30
Confirm the container displays the API SP certification. API SP specifically addresses LSPI (Low-Speed Pre-Ignition) protection — a real risk in turbocharged GDI engines like the G2.5T during cold, short-trip driving with heavy throttle inputs.
Severe Service Check
You need the 3750-mile interval if you:
- Tow a trailer or haul cargo in the bed regularly
- Drive primarily in stop-and-go traffic with frequent hard acceleration
- Make mostly short trips under 5 miles in cold weather
- Drive in dusty off-road or construction site environments
Installation Details
Drain Plug Torque: 26 ft-lbs Replace the drain plug copper washer at every service — part number 21513-23001. The Santa Cruz’s aluminum oil pan requires care not to overtighten.
OEM Filter: Hyundai 26300-35505
Aftermarket Filters:
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Mobil 1 M1C-251A
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Wix 57356
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K&N HP-1017
Pro Tip: The G2.5T spin-on filter is located on the front of the engine block, accessible from below. Use a 65mm filter wrench for removal. After a hard drive or towing session, let the engine idle for 2 minutes before shutdown to allow the turbocharger to cool down before oil circulation stops — this prevents oil coking in the turbo bearing feed line.
FAQs
What oil does a 2023 Hyundai Santa Cruz 2.5T take? 5W-30 full synthetic meeting API SP and ILSAC GF-6A standards.
How many quarts does it need? 5.3 quarts with a new filter, 5.0 quarts without.
Can I use 0W-20 instead of 5W-30? No. Hyundai specifies 5W-30 for the turbocharged G2.5T. The 0W-20 spec applies to the naturally aspirated 2.5L in the non-turbo Santa Cruz — a different engine.
Is synthetic oil required? Yes. Full synthetic is required for the G2.5T turbocharged engine.
How often should I change the oil? Every 7500 miles for normal driving. If you tow regularly or make frequent short trips, follow the 3750-mile severe service schedule.
What’s the difference between the turbo and non-turbo Santa Cruz oil spec? The non-turbo 2.5L uses 5W-20 with a 6.9-quart capacity. The turbocharged 2.5T uses 5W-30 with a 5.3-quart capacity — different engine, different viscosity, different capacity.
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Last verified: 2026-03-25 | Source: 2023 Hyundai Santa Cruz Owner’s Manual