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Top 10 Best Oil for Subaru WRX STI/Outback/Forester/Impreza Review 2021 with Buying Guides & FAQs

Need to find the best oil for Subaru WRX? Below, you can find the answer and one of the best ways to care for your Subaru’s engine.

There is a wide variety of motor oils, and we have chosen the most functional and efficient ones.

Having high-quality engine oil is an important task because of the care it can provide to the engine.

Whether it is the protection of moving parts, durability for the engine, fuel economy, or the level of cleanliness are aspects that motor oil can offer.

To choose the best possible option, you should read on.

Table of Contents

Comparison Table of Best Oil for WRX STI/Outback/Forester/Crosstrek/Impreza

Photo Title Buy
Amazon Basics High...image Amazon Basics High Mileage Motor Oil - Full Synthetic - 5W-30 - 5 Quart Check Details
Castrol 03057 GTX...image Castrol 03057 GTX MAGNATEC 5W-30 Full Synthetic Motor Oil, Green, 5 Quart Check Details
Valvoline Advanced Full...image Valvoline Advanced Full Synthetic SAE 5W-30 Motor Oil 5 QT Check Details
Castrol 03128C Edge...image Castrol 03128C Edge High Mileage 5W-30 Advanced Full Synthetic Motor Oil, 5 Quart Check Details
Mobil 1 120764...image Mobil 1 120764 5W-30 Synthetic Motor Oil - 5 Quart Check Details
Valvoline High Mileage...image Valvoline High Mileage with MaxLife Technology SAE 5W-30 Synthetic Blend Motor Oil 5 QT Check Details
Pennzoil Ultra Platinum...image Pennzoil Ultra Platinum Full Synthetic 5W-30 Motor Oil (5-Quart, Single Pack) Check Details
Valvoline Full Synthetic...image Valvoline Full Synthetic High Mileage with MaxLife Technology SAE 5W-30 Motor Oil 5 QT Check Details
Valvoline Daily Protection...image Valvoline Daily Protection SAE 5W-30 Synthetic Blend Motor Oil 5 QT, Case of 3 Check Details
Shell Rotella 550050319...image Shell Rotella 550050319 Gas Truck Full Synthetic 5W-30 Motor Oil for Pickups and SUVs (5-Quart, Case of 3) Check Details

i) What are the best oil brands for Subaru?

The best brands for Subaru are Amazon Basics, Castrol, and Valvoline. These brands have managed to develop excellent quality formulas that many users decide to choose from every day.

We have analyzed different motor oils from these manufacturers.

However, we also take into consideration additional options such as Shell motor oil or Pennzoil motor oil.

So, each user will choose the best option according to his needs or his vehicle.

ii) Why “AmazonBasics, Castrol & Valvoline” are the best oil brand for Subaru Forester/Outback/Crossterk/WRX STI?

Each of these manufacturers has developed fully synthetic motor oils with everything a vehicle’s engine needs.

In this case, we can include different aspects such as the protection or durability of the engine, the level of cleanliness applied to the moving parts, or the versatility of the motor oil in different circumstances.

Any of these motor oil manufacturers can offer a high-quality option for many Subaru Forester models. That’s why we invite you to read the options below.

Top 10 Best oil for Subaru WRX Review 2021

01. Amazon Basics 5W-30 High Mileage Full Synthetic Motor Oil

Highlighted Features

  • 160 Oz
  • 5W-30
  • 73 L
  • 75,000 miles and up
  • Fully synthetic oil

According to the opinion of many users, this option is the best oil brand for Subaru. The great features of this high mileage motor oil allow a Subaru to get its maximum performance.

It is 5 quarts in fully synthetic oil and ready to use.

By incorporating this 5W-30 full synthetic oil, the user will get an excellent interval until the next oil change.

In this case, it is a motor oil suitable for engines with more than 75,000 miles on the road. So, it is easier to achieve good performance in worn engines.

Incorporating this motor oil also means maintaining an optimum level of cleanliness in the engine. Every user will be able to notice that this motor oil prevents some problems over time.

This engine oil can prevent and decrease rust buildup or corrosion of the engine’s moving parts.

By incorporating this engine oil, it is also possible to reduce the friction of the parts to reduce engine wear.

Additionally, it is possible to avoid thermal degradation due to the high viscosity strength. The user may even notice a reduction in exhaust emissions from his vehicle.

Pros

  • Excellent engine cleanliness
  • Reduces friction
  • Reduces exhaust emissions

Cons

  • Only for engines 75,000 miles and older

02. Castrol 03057 GTX MAGNATEC 5W-30 Full Synthetic 5 Quart Motor Oil

Highlighted Features

  • 5 quarts
  • 73 L
  • Fully synthetic oil
  • 5W-30
  • Sequence IVA Industry Tested Oil

In different circumstances, Castrol is considered by many people as the best oil for Subaru. Of course, this is due to the wide variety of features that this fully synthetic oil can offer to users.

By getting this fully synthetic oil, any user will take better care of their vehicle’s engine.

Among the most efficient results obtained, this oil can provide great smoothness to the most critical moving parts of the engine. Thus, friction is significantly reduced.

Another consideration that any user may notice when incorporating this motor oil is the service life of their vehicle’s engine.

In the formulation of this motor oil, Castrol can reduce wear on moving parts. In certain instances, this means less damage and repair costs.

In addition to reducing engine wear, especially wear on critical parts.

One of the most important considerations of this fully synthetic 5W-30 oil is the superior protection against all parts in general.

Pros

  • Long engine life
  • Reduces friction
  • Special ignition protection

Cons

  • Intermediate cost-benefit ratio

03. Valvoline Advanced Full Synthetic 5 QT SAE 5W-30 Motor Oil

Highlighted Features

  • 5 quarts
  • 5W-30
  • 73 L
  • Fully synthetic oil
  • 40% more protection

When it comes to getting the best oil for Subaru Forester, this fully synthetic motor oil can be one of the best options. In this case, it is one of the preferred choices for many discerning users.

A wide variety of features is possible to get by incorporating this motor oil in a Subaru.

Among the most important features of this motor oil is the protection that the user will be providing to his vehicle’s engine.

In this way, it is possible to reduce the amount of damage that appears over time. In other words, this motor oil provides 40% more protection compared to other motor oils on the market.

Another consideration is that this oil is ten times better prepared to prevent diffusion. For this purpose, a set of special high-quality antioxidants has been used.

So that harmful viscosity growth is possible to be avoided thanks to the advanced formula incorporated in this fully synthetic motor oil.

One of the additional considerations to consider is the excellent protection against high and low temperatures.

This means that this is a motor oil specially designed to deal with a wide variety of weather conditions. So, it is a great choice before starting a journey.

Pros

  • 25% cleaner engines
  • Reduces harmful engine elements
  • Versatile in different climatic conditions

Cons

  • Intermediate level durability

04. Castrol 03128C Edge 5 Quart High Mileage 5W-30 Advanced Full Synthetic Motor Oil

Highlighted Features

  • 160 Oz liquid
  • 73 L
  • 5W-30
  • For engines over 75,000 miles
  • Fully synthetic oil

Castrol is one of the few manufacturers that can become the best oil for WRX. It is a 4.73-liter bottle completely ready to improve the efficiency of an engine.

To understand this, we must analyze the best features of the formula of this advanced level, fully synthetic motor oil.

Among the most obvious advantages possible to obtain with this motor oil is the built-in protection for your vehicle’s engine.

In this case, a formula has been developed in this of strong titanium. So, this motor oil is intended for vehicles with more than 75,000 miles.

One of the most important aspects of this motor oil is providing higher mileage for the vehicle. The performance of a Subaru’s engine will increase in both the long term and the short term.

So, this can mean a great decrease in the likelihood of engine damage.

By incorporating this oil, the user will notice a reduction in leakage due to the high resistance of the oil film.

Even deposits that decrease the energy obtained in the engine will not be a problem. All this can result in an optimization of the vehicle’s fuel economy.

Pros

  • Great engine protection and durability
  • Optimizes fuel economy
  • Reduces various types of leaks

Cons

  • Not very efficient for engines with less than 75,000 miles

05. Mobil 1 120764 5W-30 Synthetic 5 Quart Motor Oil

Highlighted Features

  • 5W-30
  • 73 L
  • Meets Ilsac Gf-6 standards
  • Fully synthetic motor oil
  • 10,000-mile protection

Today it is possible to meet many people who have obtained the best oil for Subaru STI. For that, we can analyze this fully synthetic motor oil with an advanced formula from Mobil 1.

This is an excellent cost-benefit motor oil because of the results that this oil offers.

To begin with the great features of this motor oil, we must consider the level of cleanliness that it can offer.

Any engine will be much cleaner due to the agents incorporated in the formula of this oil. In this way, it is possible to reduce sludge buildup and eliminate harmful deposits to the engine.

By incorporating this engine oil, the user will notice that protection up to 10,000 miles is obtained in the critical parts of the engine.

The formula of this oil can prevent degradation of the oil itself, control oxidation of moving parts, and maintain viscosity grade.

One consideration or advantage to keep in mind is that this motor oil has the versatility to clean the engine while optimizing fuel economy.

So, every user who uses this motor oil can decrease costs in fuel usage while also avoiding various mechanical damages.

Pros

  • Reduces oxidation
  • High level of cleanliness
  • Protects engine life

Cons

  • Intermediate temperature versatility

06. Valvoline High Mileage with MaxLife Technology 5 QT SAE 5W-30 Synthetic Blend Motor

Highlighted Features

  • 5W-30
  • 73 L
  • Synthetic blend oil
  • MaxLife Technology
  • High Mileage Oil

People have also considered that this formula can be purchased as the best oil brand for Subaru on certain occasions.

To understand this, we must analyze the most outstanding features of this synthetic blend motor oil. It is one of the most suitable options when looking for great engine protection for a Subaru.

Having this motor oil means incorporating a formula that has optimized anti-wear additives.

So, the user will incorporate a thick film on the moving parts of their vehicle’s engine. In this sense, this durable anti-wear film can reduce all types of friction or damage.

Of course, a good level of cleanliness is always important when it comes to engine oil.

This engine oil can provide great protection and cleanliness against deposits or sludge in a very simple way.

For this purpose, the best detergents have been incorporated to maintain the cleanliness of the engine.

By incorporating this motor oil into a vehicle, seal conditioners can prevent and lessen the problem of leaks.

It is also possible to notice a minimal level of oil degradation under extreme conditions thanks to the high quality of antioxidants. All that is enough to obtain one of the best results.

Pros

  • The optimal level of cleanliness
  • Prevents various leaks
  • Versatile in extreme conditions

Cons

  • Not fully synthetic oil

07. Pennzoil Ultra Platinum 5-Quart, Single Pack Full Synthetic 5W-30 Motor Oil

Highlighted Features

  • 73 L
  • Fully synthetic oil
  • High-performance additives
  • 5W-30
  • Made with natural gas

Getting the best oil for Subaru can be very simple when we analyze this Pennzoil option. We should note that this is a fully synthetic oil with a great and advanced formula.

In this case, motor oil has been designed along with high-quality additives to increase the engine’s performance.

By incorporating this fully synthetic motor oil with the ultra-platinum formula, the user will notice an increased efficiency of their engine.

This engine oil can protect the engine in extreme heat conditions or the face of too low and sudden temperatures.

Among the best features of this motor oil is the durability that it is possible to offer to a vehicle’s engine. This motor oil can provide an excellent level of cleanliness.

To this end, this motor oil decreases the number of deposits or sludge that can damage the moving parts.

Another useful aspect to consider in this motor oil is its resistance to different weather conditions.

So, this motor oil can resist thermal degradation or viscosity loss. Thus, every user will always be able to obtain an optimum level of stability.

Pros

  • High-quality cleanliness
  • Versatility with different temperatures
  • Prevents thermal degradation and viscosity loss

Cons

  • Intermediate level durability

08. Valvoline Full Synthetic High Mileage with MaxLife Technology 5 QT SAE 5W-30 Motor Oil

Highlighted Features

  • 73 L
  • 5W-30
  • MaxLife Technology
  • 5 QT
  • High Mileage Oil

Any user who wants to take care of their Subaru vehicle needs to get the best oil for Subaru Forester.

This fully synthetic motor oil includes all the necessary features for great engine care of their vehicle for many people. That is why it is one of the most popular choices these days.

In this case, this is a high-mileage, fully synthetic motor oil that includes MaxLife technologies.

This means that it is possible to incorporate this motor oil into a vehicle that has exceeded 75,000 miles of mileage. So, this motor oil will be able to protect the worn moving parts of the engine.

Incorporating this motor oil means getting a set of anti-wear additives to protect the engine.

In this way, every user will be incorporating a thick and highly durable coating on the moving parts of their engine. In this case, it is a film that can decrease the likelihood of engine damage.

Another consideration of this engine oil is the high level of cleanliness to combat deposits and sludge.

This is how a completely clean engine will be able to run more efficiently. Additionally, the formula of this motor oil allows it to prevent and treat all types of leaks.

Pros

  • High level of cleanliness
  • Versatile at different temperatures
  • Engine wear-reducing formula

Cons

  • Not very useful for new engines

09. Valvoline Daily Protection SAE 5W-30 5 QT, Case of 3 Synthetic Blend Motor Oil

Highlighted Features

  • 5 quarts
  • 73 L per bottle
  • 5W-30
  • Daily Protection Oil
  • Synthetic blend motor oil

This Valvoline model is another great choice among all the options that we can mention to get the best oil for WRX.

This synthetic blend motor oil can provide the necessary and sufficient protection for any Subaru-compatible vehicle.

One of the most suitable features of this motor oil is that it has a universal fit and a flashpoint of almost 400 degrees Celsius.

In addition to that, every user will be able to be incorporating great additional protection to the critical parts of their engine. Therefore, it is another popular choice for everyday vehicles.

Incorporating this engine oil means protecting the moving engine parts of a Subaru from deposits and sludge.

In such a way that the detergents incorporated in the formula of this motor oil are among the most efficient of today. This way, it will be easier with a more efficient and thoroughly clean engine.

Every user looking for the best performance should consider this low-friction formula one of the most suitable.

Overall, this motor oil allows for optimized fuel economy as a result. So, the user will be able to save money on repairs as well as fuel usage.

Pros

  • High level of cleanliness
  • Optimizes fuel economy
  • Versatility in different weather conditions

Cons

  • Mid-level efficiency

10. Shell Rotella 550050319 Gas Truck 5-Quart, Case of 3 Full Synthetic 5W-30 Motor Oil

Highlighted Features

  • 73L per bottle
  • 5W-30
  • Fully synthetic oil
  • Designed for pickup trucks and SUVs
  • Meets quality standards

When it comes to getting the best oil for Subaru STI, this option is one of the most efficient.

This is mainly because it is a fully synthetic motor oil designed for gas vans or sport utility vehicles.

When this fully synthetic motor oil is incorporated into compatible vehicles, the user will be incorporating an excellent level of protection into their vehicle.

This motor oil has the potential to optimize the efficiency of your vehicle’s engine performance.

Among the best features of this motor oil, we can consider the efficiency obtained in the engine.

Every driver will be able to obtain greater responsiveness and efficiency regardless of weather conditions or road conditions. This can be noticed in the most severe driving conditions.

Once again, we can consider that this motor oil provides an excellent level of cleanliness against harmful deposits or sludge.

Of course, it is one of the best features since a vehicle will count on a completely clean engine. Additionally, this motor oil provides good additional protection for towing and transporting vehicles.

Pros

  • High-quality cleanliness
  • Versatile in different weather conditions
  • Provides great engine protection

Cons

  • Not designed for cars

Buying Considerations Best Oil for Subaru Outback/Crosstrek/Forester/WRX STI

Once we have analyzed the most suitable motor oils for Subaru, we have done half of the work.

To make the best decision, it is necessary to analyze the most important aspects of each motor oil. Not all options on the market can provide the same results.

That is why the following aspects are important.

Viscosity grade

Here the viscosity grade is an important aspect before purchasing any type of motor oil. Specifically, the viscosity grade allows a motor oil to adapt to certain climatic conditions.

Each user can purchase a motor oil that is less or more dense depending on the geographical area and temperature of the place where they live.

Very viscous motor oil may be an excellent choice for a geographical area with a high temperature.

The same is true when choosing a motor oil with a low viscosity level for a geographical area with low temperatures.

When a user obtains the most suitable viscosity grade for their vehicle, the motor oil will flow more easily.

Temperature versatility

One of the aspects we can notice in any motor oil is its versatility in different temperatures. Not all motor oils are designed in the same way to withstand any type of temperature.

Each motor oil can offer a certain freezing point, as well as a certain boiling point.

This means that engine oil is prepared to withstand certain low or high temperatures.

Beyond that, here, we have considered only engine oils with a 5W viscosity grade and a 30-temperature versatility.

These values may be more than enough to be able to use a Subaru in a wide variety of different climatic conditions.

Cleanliness level

Efficient motor oil must contain the necessary additives and detergents to clean the inside of a vehicle’s engine.

This is one of the most important aspects to keep in mind, as any engine gets dirty over time.

The accumulation of deposits or sludge is always detrimental to any type of vehicle, including Subaru models.

The cleaning agents in engine oil are designed to reduce and remove all deposits and dirt.

When an engine oil manages to reduce these components, the vehicle’s engine will have the ability to run more efficiently.

This means reducing the level of wear on the engine’s moving parts and protecting the vehicle’s service life.

Compatibility

When choosing a specific motor oil, we can notice a great variety of formula designs. On the one hand, some motor oils are specially designed for vehicles with high mileage.

Some of these options are usually prepared for critical parts and engines that are already worn out and have more than a certain mileage.

On the other hand, there are also other motor oils for newer vehicles or even those requiring daily protection.

Having the specific motor oil required for each vehicle makes it possible to take full advantage of the results of each of these formulas.

In this way, it will be possible to obtain excellent oil change intervals.

Type of oil

In addition to the characteristics we have mentioned, one of the aspects to consider is the type of motor oil you wish to choose.

One of the cheapest options on the market is mineral motor oil.

This is a cheap motor oil that does not include additives and therefore cannot provide the wide variety of features that the rest of the options offer.

There are also mixed motor oils that combine the characteristics of mineral motor oils with some synthetic oils.

However, here we have mostly taken into consideration fully synthetic motor oils.

While they are the most expensive option, this type of motor oil also offers the best advantages and benefits for vehicles.

Important FAQs for the Best Oil for Subaru WRX STI/Outback/Forester/Impreza

What oil is efficient for a Subaru WRX?

As mentioned above, among the most efficient options today are Valvoline, Castrol, and Mobil 1 motor oil, as well as Amazon Basics motor oil.

Any of these manufacturers have managed to develop high-quality formulas to be able to optimize the performance of this Subaru model, as well as many other vehicles.

In addition to that, it is important to consider each of the compatibility aspects before incorporating a specific motor oil into this Subaru model.

This usually happens because a Subaru WRX needs a long mileage motor oil when it is a used vehicle.

Incorporating motor oil from some of these manufacturers will also offer an excellent level of cleanliness.

Is it advisable to add Castrol oil to a WRX?

In many instances, many people have considered Castrol motor oil to be among the most efficient options today.

Many options from this manufacturer include everything needed in an efficient formula to optimize different aspects of a vehicle’s engine.

In this case, we can include both engine protection and cleanliness level.

In principle, this manufacturer’s motor oil can excellently protect each of the moving parts of a vehicle’s engine.

At the same time, this motor oil also can apply an excellent level of cleanliness inside an engine.

In this way, the owner of a Subaru will be able to use his vehicle with a high level of efficiency and improved fuel economy.

What type of oil should I put in a WRX?

Among all the types of motor oil on the market today, it is best to use fully synthetic motor oil for a Subaru WRX.

As we mentioned above, a fully synthetic motor oil incorporates many positive features, such as the best additives.

When a blended motor oil or mineral motor oil is incorporated, the number of benefits and results obtained is very poor compared to fully synthetic motor oil.

Having a motor oil that includes excellent additives will take care of the useful life of the vehicle’s engine. In addition, fully synthetic oil could even prevent mechanical damage due to wear.

Should a special oil be added to a Subaru?

For the most part, Subaru models and vehicles do not need special oil.

In any case, a great deal of people incorporates completely synthetic motor oil. This sort of motor oil requires a bigger budget because of its costs.

Of course, this happens because it is a more efficient motor oil than others.

Beyond the cost needed for this motor oil, the fully synthetic oil will be able to take care of the lifetime of the entire engine while implementing excellent cleanliness.

This way, the user will have the possibility to avoid certain common problems, such as corrosion, accelerated wear of parts, possible mechanical damage, and many other problems.

Is 0W-20 or 5W-30 better?

The viscosity and the tolerance of motor oil for different temperatures are different aspects to consider for a vehicle.

In principle, denser motor oil than another may be much more efficient in a high-temperature geographical area. Thus, the engine oil will be able to tolerate different climatic conditions.

So also, each engine oil has a limit on the lowest temperature it can withstand, which is the same as for the highest temperature.

Considering this aspect in the next fully synthetic motor oil will allow taking advantage of the maximum functionality and the best results.

Should I choose full synthetic or blended oil?

Based on what we have analyzed, a blended oil cannot offer the high level of efficiency that a fully synthetic oil can.

Blended motor oil can offer an array of features along with a relatively affordable cost. To take the best care of a vehicle’s engine, choosing a fully synthetic oil is always more advisable.

Conclusion

Once the user has the best oil for Subaru WRX, their vehicle can always be much more protected. Having a high-quality, fully synthetic motor oil can be costly compared to a blended oil or mineral oil.

Beyond that, a high-quality, fully synthetic motor oil is the best choice for taking care of a vehicle’s engine.

Incorporating this type of motor oil can be cheaper at the end of it all. A lot of mechanical problems and damage can be avoided with this type of motor oil.

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