The 2018 Kia Soul is a compact crossover known for its practicality, fuel efficiency, and reliable performance. To keep the engine running smoothly, proper oil selection and timely maintenance are essential.
Using the correct engine oil helps improve fuel economy, reduce engine wear, and prevent long-term issues such as sludge buildup or excessive oil consumption.
What Type of Oil Does 2018 Kia Soul Use?
The recommended oil type depends on engine configuration:
- 1.6L 4-cylinder engine: SAE 5W-20 or SAE 5W-30 full synthetic oil
- 2.0L 4-cylinder engine: SAE 5W-20 full synthetic oil (preferred)
- API SN or higher certification required
The best overall choice is 5W-20 full synthetic oil, which provides excellent fuel economy and engine protection in all temperatures.
2018 Kia Soul Oil Capacity
Oil capacity varies depending on engine type and oil filter replacement:
Engine | Oil Capacity (with filter) |
|---|---|
1.6L 4-Cylinder | 3.7 – 3.8 quarts (3.5 – 3.6 liters) |
2.0L 4-Cylinder | 4.0 – 4.2 quarts (3.8 – 4.0 liters) |
Always check oil level using the dipstick after refilling to avoid overfilling, which can cause engine damage or smoke.
2018 Kia Soul Oil Change Interval
Recommended oil change intervals:
- Every 5,000 – 7,500 miles (normal driving conditions)
- Every 3,000 – 5,000 miles (severe driving conditions)
- At least every 6 months
2018 Kia Soul Oil Change Cost
Typical oil change cost breakdown:
Service Type | Estimated Cost |
|---|---|
DIY Oil Change | $40 – $65 |
Independent Workshop | $80 – $120 |
Dealership Service | $120 – $180 |
Best Oil for 2018 Kia Soul
- Mobil 1 Advanced Full Synthetic 5W-20
- Castrol EDGE 5W-20
- Valvoline Advanced Full Synthetic 5W-20
- Royal Purple 5W-20 High Performance
- Kia Genuine Motor Oil
Full synthetic oil is strongly recommended to improve engine life and reduce sludge formation.
How to Change Oil in 2018 Kia Soul
- Warm engine for 3–5 minutes
- Park vehicle on level ground
- Drain old engine oil completely
- Replace oil filter (recommended every change)
- Reinstall drain plug securely
- Refill with correct oil type (5W-20 or 5W-30)
- Check oil level using dipstick
- Start engine and inspect for leaks
Common Engine Problems Related to Oil
- High oil consumption in higher mileage engines
- Valve cover gasket leaks
- Engine knocking due to low oil
- Sludge buildup from missed oil changes
- Overheating due to degraded oil
Signs You Need an Oil Change
- Dark or dirty engine oil
- Reduced fuel efficiency
- Engine noise or knocking
- Burning smell
- Oil warning light
Maintenance Tips for Longer Engine Life
- Check oil every 1–2 weeks
- Use full synthetic oil only
- Replace oil filter regularly
- Avoid aggressive driving on cold starts
- Follow strict oil change intervals
Frequently Asked Questions (FAQ)
What oil does a 2018 Kia Soul use?
The 2018 Kia Soul uses 5W-20 or 5W-30 full synthetic oil depending on engine type.
How much oil does a 2018 Kia Soul take?
It takes about 3.7 to 4.2 quarts depending on engine configuration.
Can I use 5W-30 instead of 5W-20?
Yes, but 5W-20 is the recommended oil for best fuel efficiency.
How often should I change oil?
Every 5,000–7,500 miles or every 6 months.
Does Kia Soul burn oil?
Some higher mileage engines may consume oil, so regular checks are important.
Final Thoughts
The 2018 Kia Soul is a reliable and efficient vehicle, but proper oil maintenance is essential. Using high-quality synthetic oil and following regular service intervals ensures long engine life, smooth performance, and fewer engine issues.