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2008 Subaru Impreza Oil Type

2008 Subaru Impreza Oil Type

The 2008 Subaru Impreza stands out as a versatile and reliable vehicle, offering a combination of performance, comfort, and all-wheel drive capability. Designed with both daily commuting and weekend adventures in mind, the Impreza has garnered a loyal following among car enthusiasts and casual drivers alike.

To keep your 2008 Subaru Impreza running smoothly and efficiently, it’s essential to use the correct oil type. The right engine oil protects your engine from wear and tear, improves fuel economy, and reduces emissions. Using the wrong oil type can reduce performance, increase engine wear, and even void your warranty.

The following sections will delve into the specifics of the 2008 Subaru Impreza’s oil requirements, touching on aspects like API classifications, ILSAC certification, viscosity considerations, and synthetic oil compatibility. Additionally, we’ll examine oil change intervals, provide maintenance guidance, and answer common questions to equip you with the knowledge necessary to maintain your Impreza’s performance and longevity.

For the 2008 Subaru Impreza, the preferred oil viscosity is 5W-30. This grade provides an optimal balance of engine protection, fuel efficiency, and cold-start performance. It is suitable for most driving conditions and is the manufacturer’s recommended choice for your vehicle.

How many Litres of oil does a 2008 Subaru Impreza take?

When selecting the appropriate oil viscosity for your 2008 Subaru Impreza, it’s important to consider the temperature range you’ll be driving in. The table below provides recommended viscosities for various temperatures:

  • 5W-30: Suitable for all temperatures
  • 10W-30: Suitable for temperatures above 0°F (-18°C)
  • 5W-20: Suitable for temperatures below 60°F (16°C)

While it’s generally best to stick with one brand and the viscosity of oil, it is acceptable to mix different brands if they share the same API classification and SAE viscosity as recommended by Subaru. However, to ensure optimal engine protection and performance, it’s advisable to use the same oil brand and type for each oil change whenever possible.

How Many Litres of Oil Does a 2008 Subaru Impreza Take?

The 2008 Subaru Impreza’s engine oil capacity is 4.2 US quarts (4.0 liters, 3.5 Imperial quarts). This measurement includes the additional oil needed when replacing the oil filter during an oil change. It’s essential to adhere to this capacity to ensure optimal engine performance and protection.

The 2008 Subaru Impreza with a 2.5L 4-cyl EJ253 engine uses 10W-30, 10W-40 (Above -20), and 5W-30 (All TEMPS) oil types with a capacity of 4.4 quarts (4.2 liters) with filter. SAE 5W-30 is preferred

Understanding API Classifications and ILSAC Certification

The American Petroleum Institute (API) sets the industry standard for engine oil quality. For the 2008 Subaru Impreza, the recommended API classification is SM with the “ENERGY CONSERVING” label. This classification ensures that the oil meets the necessary engine protection standards and contributes to fuel efficiency.

The International Lubricant Standardization and Approval Committee (ILSAC) certification mark, also known as the starburst mark, signifies that the engine oil has been tested and approved for gasoline engines. For your 2008 Subaru Impreza, look for oil containers with the ILSAC starburst mark to ensure the oil is suitable for your vehicle.

API classifications and ILSAC certification marks are crucial indicators of engine oil quality. By choosing an oil that meets both the API classification SM with “ENERGY CONSERVING” and the ILSAC certification mark, you can be confident that you’re providing your 2008 Subaru Impreza with the proper protection and performance. These certifications help maintain your vehicle’s engine health, promote fuel efficiency, and ensure compliance with warranty requirements.

Using Synthetic Oil in Your 2008 Subaru Impreza

Synthetic oil can be used in your 2008 Subaru Impreza as long as it meets the same requirements as conventional engine oil. If you decide to switch between synthetic and conventional oil, ensure that they have the same API classification, viscosity, and grade as recommended by Subaru.

When using synthetic oil in your 2008 Subaru Impreza, it must meet the API classification SM with “ENERGY CONSERVING” and have the ILSAC certification mark (starburst mark). Additionally, the synthetic oil should have the same viscosity and grade as stated in the owner’s manual.

Oil Change Intervals with Synthetic Oil

If you choose to use synthetic oil in your 2008 Subaru Impreza, it is essential to follow the recommended oil and filter change intervals. Generally, synthetic oil has a longer lifespan than conventional oil, so the change intervals may differ. Consult your owner’s manual to determine the appropriate oil change intervals for your specific vehicle and driving conditions when using synthetic oil.

Oil Change Frequency and Maintenance

Several factors can influence the frequency of oil changes for your 2008 Subaru Impreza. These include driving conditions, climate, type of oil used (conventional or synthetic), and your driving habits. For example, frequent short trips, driving in extreme temperatures, or heavy-duty use may require more frequent oil changes.

It is essential to follow the recommended oil change schedule provided in your 2008 Subaru Impreza owner’s manual. Typically, oil changes should be performed every 3,000 to 5,000 miles for conventional oil, while synthetic oil may last up to 7,500 miles or more between changes.

As a 2008 Subaru Impreza owner, I’ve found that it’s better to change the oil every 7,500 miles, even though it’s an older vehicle. This interval allows me to maintain my car’s performance while not overburdening it with too frequent oil changes.

However, it’s essential to consider that factors such as driving conditions, climate, and your driving habits can impact the ideal oil change frequency for your specific situation. In my case, I primarily drive in moderate temperatures and don’t engage in heavy-duty use, so the 7,500-mile interval works well for me.


Maintaining the proper oil type and viscosity in your 2008 Subaru Impreza is crucial for the longevity and performance of your vehicle. By adhering to the recommendations outlined in this article, you’ll not only protect your engine but also ensure a smoother and more efficient driving experience.

As you continue to enjoy the benefits of your 2008 Subaru Impreza, remember that using the correct oil, following the recommended oil change intervals, and staying on top of regular maintenance will contribute to the overall health of your car. Doing so will safeguard your investment and keep your Impreza running at its best for years to come.

Additional Resources

  1. Subaru Official Website (
  2. Consumer Reports – Subaru Impreza (
  3. Edmunds – Subaru Impreza (
  4. Kelley Blue Book – Subaru Impreza (
  5. NASIOC (
  6. Subaru Impreza Reddit Community (
2008 2.5 Subaru Impreza oil change


About Thomas Buck

Thomas is our expert in the field of motor oils and lubricants. He worked for more than 15 years at the dealer service station and has the vast practical experience, so he gladly agreed to be the editor and co-author of our articles about motors and motor oils.

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