Knowing the correct engine oil capacity for your Subaru Ascent ensures you use the right amount of oil, prevent engine strain, and maintain peak performance.
In this post, we’ll break down the Subaru Ascent oil capacity, discuss the recommended oil type, and provide useful maintenance tips to help extend the life of your SUV.
Subaru Ascent Engine Oil Capacity
The Subaru Ascent engine oil capacity is 4.8 quarts (4.5 liters) with a filter change. This applies to all model years of the Ascent (2019–present), as they share the same 2.4L turbocharged BOXER engine.
It is important to note that oil capacity includes the oil filter. If you change the oil without replacing the filter, the required oil amount will be slightly less, but it is always recommended to change the filter during every oil change for maximum engine protection.
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Best Recommended Oil for Subaru Ascent
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1. Subaru Genuine Synthetic 0W-20 Motor Oil – Designed specifically for Subaru engines.
2. Mobil 1 Advanced Fuel Economy 0W-20 – Known for long-lasting wear protection and efficiency.
3. Castrol EDGE Advanced Full Synthetic 0W-20 – Offers titanium-based strength for turbocharged engines.
Subaru specifies the use of SAE 0W-20 synthetic oil for the Ascent. This oil provides excellent cold-start performance, fuel efficiency, and superior protection against wear, important for turbocharged engines.Related Subaru Engine Oil Capacity Chart(For All Models)
Key reasons to use 0W-20 synthetic oil in your Subaru Ascent:
- Better protection – Thin enough to flow easily during cold starts, yet strong enough to protect under high heat and stress.
- Turbocharger safety – Prevents oil coking and deposits inside the turbocharger.
- Improved fuel economy – Low viscosity reduces engine drag, helping with efficiency.
- Manufacturer warranty compliance – Using the recommended oil type ensures your Subaru remains within warranty standards.
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Subaru Ascent Engine Overview
The Subaru Ascent comes equipped with a 2.4-liter turbocharged direct-injection SUBARU BOXER® engine. This engine balances efficiency and power, producing up to 260 horsepower and 277 lb-ft of torque, making it suitable for both daily commutes and towing needs.
Because it is a turbocharged engine, proper oil care is even more critical compared to naturally aspirated engines. Turbochargers operate at extremely high temperatures, meaning the oil not only lubricates but also cools vital components. If you neglect oil changes or use the wrong oil type, the risk of sludge buildup, overheating, or premature turbo wear increases significantly.
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Subaru Ascent Oil Change Interval
Subaru recommends changing the oil in your Ascent every 6,000 miles or 6 months, whichever comes first. However, driving habits and conditions can influence this schedule.
- Severe driving conditions (frequent short trips, towing, stop-and-go traffic, or extreme temperatures) may require more frequent oil changes, closer to every 3,000–4,000 miles.
- For normal driving conditions, sticking to the 6,000-mile interval should be sufficient.
Always monitor the oil level and quality between changes. If the oil looks dirty, smells burnt, or drops below the recommended level, top it up or replace it sooner.
Checking Oil in the Subaru Ascent
To keep your Ascent running smoothly, you should check the oil level regularly. Here’s how:
- Park on a level surface and turn off the engine.
- Allow the engine to cool for a few minutes.
- Locate the oil dipstick (yellow handle).
- Pull out the dipstick, wipe it clean, and reinsert it fully.
- Pull it out again and check the oil level. The oil should be between the L (Low) and F (Full) marks.
- If the oil is below the minimum mark, add the recommended 0W-20 synthetic oil gradually, checking the level until it reaches the correct range.
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Common Oil-Related Problems in Subaru Ascent
While the Subaru Ascent is a reliable SUV, some owners have reported oil-related issues. Being aware of them can help you maintain your vehicle better:
- Oil consumption – Some Subaru turbo engines have been noted for slightly higher oil consumption. Regularly check the dipstick between oil changes.
- Turbo deposits – Using low-quality oil or neglecting oil changes may lead to carbon deposits inside the turbocharger.
- Oil leaks – Over time, seals and gaskets may degrade, causing leaks. Regular inspections help detect issues early.
By following the recommended maintenance schedule and using high-quality synthetic oil, most of these issues can be avoided.
DIY vs. Professional Oil Change
Changing the oil in a Subaru Ascent can be done at home if you have the right tools, but many owners prefer professional service for peace of mind.
DIY oil change benefits:
- Saves money on labor costs.
- Full control over the oil and filter used.
- Great for those comfortable with vehicle maintenance.
Professional oil change benefits:
- Certified Subaru technicians are familiar with your vehicle.
- Inspection of other components (brakes, suspension, belts, etc.).
- Convenience and warranty protection.
Final Thoughts
The Subaru Ascent engine oil capacity is 4.8 quarts (4.5 liters) with a filter change, and it requires 0W-20 synthetic oil for optimal performance. Sticking to the recommended oil change intervals and using high-quality oil will keep your Ascent’s turbocharged engine running smoothly for years to come.
Whether you handle oil changes yourself or rely on a professional, staying on top of maintenance ensures your Subaru Ascent continues to deliver reliability, efficiency, and performance for your family’s adventures.
