The 2018 Hyundai Sonata is a dependable midsize sedan that delivers efficiency and comfort. Like all vehicles, regular oil changes are one of the most important maintenance tasks to keep your Sonata’s engine running smoothly. Using the right oil type and filling to the proper capacity ensures performance, longevity, and fuel efficiency. In this guide, we’ll cover the recommended oil type, oil capacity, and the best oils for the 2018 Hyundai Sonata.
Quick Facts
- Engines Available:
- 2.4L 4-cylinder
- 2.0L Turbo 4-cylinder
- 1.6L Turbo 4-cylinder (Eco trim)
- Oil Capacity (with filter):
- 2.4L: 4.9 quarts (4.6 liters)
- 2.0L Turbo: 5.1 quarts (4.8 liters)
- 1.6L Turbo: 4.8 quarts (4.5 liters)
- Recommended Oil Type: SAE 5W-30 or SAE 5W-20, full synthetic (API SN or higher, ILSAC GF-5)
- Oil Change Interval: Every 7,500 miles under normal driving, or 3,000–5,000 miles in severe conditions
Best Motor Oils for 2018 Hyundai Sonata
Hyundai recommends full synthetic oils for the 2018 Sonata. Here are some top choices:
- Mobil 1 Advanced Full Synthetic 5W-30 – Premium synthetic oil that offers excellent protection and performance.
- Castrol EDGE Advanced Full Synthetic 5W-30 – Strong anti-wear properties with titanium technology.
- Valvoline Advanced Full Synthetic 5W-30 – Affordable, widely available, and OEM-approved.
- Pennzoil Platinum Full Synthetic 5W-30 – Made from natural gas, keeps engines exceptionally clean.
Buyer’s Guide: Choosing the Right Oil
When selecting oil for your 2018 Sonata, keep these considerations in mind:
- Viscosity: Use SAE 5W-30 (or 5W-20 if specified in your owner’s manual).
- Full Synthetic: Required for optimal protection in modern Hyundai engines.
- Turbo Engines: The 1.6L and 2.0L turbo engines benefit from high-quality full synthetics like Mobil 1 or Castrol EDGE.
- Driving Conditions: Severe driving (short trips, extreme temperatures, towing) requires more frequent oil changes.
- High Mileage: If your Sonata has over 100,000 miles, consider high-mileage synthetic oil for extra seal protection.
Detailed Product Reviews
Mobil 1 Advanced Full Synthetic 5W-30
Who it’s for: Sonata owners who want maximum engine protection.
- Key Benefits: Excellent wear protection, long drain intervals, great for turbos.
- Pros: Trusted by automakers, improves efficiency, protects under extreme conditions.
- Cons: Higher cost than conventional oils.
Final Verdict: A premium choice for long engine life. Check price on Amazon
Castrol EDGE Advanced Full Synthetic 5W-30
Who it’s for: Drivers looking for premium wear protection.
- Key Benefits: Titanium technology, reduces metal-to-metal contact, great under high load.
- Pros: Excellent for turbocharged engines, strong deposit control.
- Cons: Slightly more expensive than Valvoline or Pennzoil.
Final Verdict: Ideal for drivers who push their Sonata hard. Check price on Amazon
Valvoline Advanced Full Synthetic 5W-30
Who it’s for: Budget-conscious drivers who still want high-quality protection.
- Key Benefits: Protects against wear, sludge, and deposits at a lower cost.
- Pros: Affordable, OEM-approved, widely available.
- Cons: Not as advanced as premium synthetics like Mobil 1.
Final Verdict: A great balance of cost and performance. Check price on Amazon
Pennzoil Platinum Full Synthetic 5W-30
Who it’s for: Owners who value engine cleanliness and efficiency.
- Key Benefits: Made from natural gas, keeps engines up to 40% cleaner.
- Pros: Excellent for preventing sludge, improves fuel economy.
- Cons: May cost more than Valvoline.
Final Verdict: Great for keeping your Sonata’s engine spotless. Check price on Amazon
Comparison Table
| Oil | Type | Best For | Amazon Link |
|---|---|---|---|
| Mobil 1 Advanced 5W-30 | Full Synthetic | Maximum protection, turbo engines | View Price |
| Castrol EDGE 5W-30 | Full Synthetic | Premium wear protection | View Price |
| Valvoline Advanced 5W-30 | Full Synthetic | Budget-friendly protection | View Price |
| Pennzoil Platinum 5W-30 | Full Synthetic | Engine cleanliness, efficiency | View Price |
FAQ
What oil does the 2018 Hyundai Sonata use?
The 2018 Sonata uses SAE 5W-30 full synthetic oil. In some cases, 5W-20 is also acceptable—check your owner’s manual.
How much oil does the 2018 Hyundai Sonata take?
The oil capacity is 4.9–5.1 quarts depending on the engine (2.4L, 2.0T, or 1.6T).
Does the 2018 Sonata require synthetic oil?
Yes. Hyundai recommends full synthetic oil for optimal performance and longevity.
How often should I change the oil?
Every 7,500 miles under normal driving conditions, or 3,000–5,000 miles under severe conditions.
Can I use high-mileage oil in my Sonata?
Yes. If your Sonata has over 100,000 miles, a high-mileage synthetic formula can help reduce oil burn-off and leaks.
Conclusion
The 2018 Hyundai Sonata requires SAE 5W-30 full synthetic motor oil, with an oil capacity of 4.9–5.1 quarts depending on the engine. For OEM reliability, Mobil 1 Advanced Full Synthetic and Castrol EDGE are excellent premium options. For budget-conscious owners, Valvoline Advanced and Pennzoil Platinum deliver great value and performance. Sticking with the correct oil type and change intervals will keep your Sonata running strong for years. Get Mobil 1 5W-30 for your 2018 Sonata today.
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