The Subaru WRX is a premium quality vehicle and requires the best of care. It has a lot of products that are compatible with it, and to save you from searching the entire market for finding the perfect product, I have provided a comprehensive guide along with their advantages and disadvantages which will help you in making an informed decision.

Best Oil for Subaru WRX Reviewed 

1.Castrol 03057 GTX MAGNATEC 5W-30 Full Synthetic Motor Oil, Green

Castrol 03057 GTX MAGNATEC 5W-30 Full Synthetic Motor Oil, Green

Key Details:

  • Manufacturer: Castrol
  • Viscosity: 5W-30
  • Style: GTX MAGNATEC Full Synthetic
  • Liquid Volume: 5 Quarts

The Castrol GTX MAGNATEC 5W-30 Full Synthetic Motor Oil is an amazing product manufactured by Castrol.  It perfectly suits the needs of your Subaru WRX engine and ensures elite performance. The product is specialized to smoothen the crucial engine parts by up to 4 times which results in reduced problem of deposits and sludge (as per Sequence IVA wear test.) 

It provides 6x better wear protection when compared to the conventional oil types which results in an improved overall performance of your vehicle. It also aids in reducing the problem of engine breakdown and provides for longer drain intervals which is cost effective. The product recommends usage of Bosch oil fitters for the best performance. It is a full synthetic product thus providing much better benefits when compared to synthetic blend or conventional oil types. 

Since the product provides so many benefits, the cost is naturally a bit higher than some of its other competitors which may not be desirable for some users. However, it improves the fuel economy of the vehicle which is always an added benefit. It also performs extremely well under cold temperatures and eliminates the problem of poor ignition. 

It exceeds the API SP, SN PLUS, SN, SM, ILSAC GF-6A GMdexos1 Gen2 requirements and is certified by the American Petroleum Institute for its usage in gasoline vehicles.


Pros
  • 4x smoother engine parts
  • Works well under extreme conditions
  • 6x better wear protection
  • Prevents oil breakdown
Cons
  • Costly product

2.Subaru SOA868V9285 / SOA427V1415 SAE 5W30 Synthetic Motor Oil

Subaru SOA868V9285 / SOA427V1415 SAE 5W30 Synthetic Motor Oil

Key Details:

  • Manufacturer: Subaru
  • Viscosity: 5W-30
  • Style: Synthetic Motor Oil
  • Liquid Volume: 128 Fluid Ounces

The Subaru SAE 5W-30 Synthetic Motor Oil is the perfect choice for your Subaru WRX engine as it has been manufactured by the same developers. It provides excellent protection against varnish. 

The product helps in dealing with the problem of poor fuel economy by drastically improving it. It extends the drain intervals along with providing excellent protection to your vehicle at the same time. It protects the engine from deposits and sludge and maximizes the performance of the vehicle. The product has a low cost thus making it extremely affordable. The product has been expertly formulated to in a way that it contains less than 10% ethylene glycol which is beneficial for the vehicle.

It provides excellent performance under cold temperatures and reduces the problem of LSPI. It also is able to withstand a tremendous amount of pressure under extreme conditions by creating a thicker oil layer around the critical engine parts. Moreover, it also thoroughly cleanses the key engine parts and ensures smoother driving experience and an extended engine life.

A problem of the product is that the packaging material of the product is of poor quality thus making it prone to oil leaks which can cause problems.

It meets the API SN, SN PLUS and is recommended by the American Petroleum Institute for its usage in gasoline engines.


Pros
  • Less ethylene glycol 
  • Extremely affordable price
  • Increased engine protection
  • Improves fuel economy
Cons
  • Frequent oil leaks

3.Castrol 03084C Edge 5W-30 Advanced Full Synthetic Motor Oil

Castrol 03084C Edge 5W-30 Advanced Full Synthetic Motor Oil

Key Details:

  • Manufacturer: Castrol
  • Viscosity: 5W-30
  • Style: Advanced Full Synthetic
  • Liquid Volume: 160 Fluid Ounces

The Castrol EDGE 5W-30 Advanced Full Synthetic Motor Oil is yet another product which works extremely well in the Subaru WRX engine. It ensures one of the best engine performances as it is formulated with the Fluid Titanium Technology which provides exceptional strength to the engine.

It reduces the overall metal contact in the engine by creating a thicker oil film which aids the engine in achieving an improved performance. The product despite providing a lot of benefits has an extremely reasonable cost which can be easy to afford for most customers. It also reduces the deposits formation in the engine which helps in maximizing engine response time. 

It performs extremely well under cold temperatures and prevents the LSPI problem. Moreover, it also helps provide better protection under extreme conditions which can damage the engine if inferior motor oils are used. It provides 3x stronger viscosity breakdown protection than Mobil 1 (as per the ASTM D6278 test.)

The only drawback of this product is that it may cause an increase in oil burning which may hurt the vehicle. 

It exceeds the API SP, SN, SN PLUS, ISAC GF-6A, ACEA A5/B5, GM dexos1 Gen2 requirements and is certified by the American Petroleum Institute for its usage in gasoline engines.

Pros
  • Extreme temperature protection
  • Increased drain intervals
  • Maximizes engine performance
  • 3x better viscosity breakdown protection
Cons
  • Oil burning may increase

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

Valvoline Advanced Full Synthetic SAE 5W-30 Motor Oil

Key Details:

  • Manufacturer: Valvoline
  • Viscosity: 5W-30
  • Style: Advanced Full Synthetic
  • Liquid Volume: 5 Quarts

The Valvoline Advanced Full Synthetic SAE 5W-30 Motor Oil is an extremely reliable product manufactured by Valvoline. The company has been around for more than 150 years and has the trust of millions of customers all over the world. It is a perfect product to cater to the needs of your Subaru WRX engine and maximize its performance.

It has elite anti-wear additives which provide 50% better wear protection when compared to the industry standards (as per the Sequence IVA wear test.) It is an advanced full synthetic motor oil thus provides far greater benefit than any of the conventional or synthetic blend motor oils. It extends the drain intervals and fights off unnecessary sludge and deposits in the engine to get a smoother driving experience.

It also improves the overall fuel economy of your vehicle which in turn saves the overall cost. It is also equipped with high-quality antioxidants which aid in preventing the problem of oil breakdown in the engine. The product also works extremely well under cold temperatures and provides you with an easier ignition. 

The only problem associated with the product is that the cap of the product is made out of poor material which may lead to oil leaks.

It meets the API SP, SN, SN PLUS, ILSAC GF-6A requirements and is certified by the American Petroleum Institute for its usage in gasoline vehicles.


Pros
  • 50% better wear protection
  • Reduces sludge and deposits
  • Decreases oil breakdown
  • Cold temperature protection
Cons
  • Poor seal cap

5.Royal Purple 51530 High Performance Motor Oil 5W-30

Royal Purple 51530 High Performance Motor Oil 5W-30

Key Details:

  • Manufacturer: Royal Purple
  • Viscosity: 5W-30
  • Style: High Performance
  • Liquid Volume: 160 Fluid Ounces

The Royal Purple High Performance Motor Oil 5W-30 is possibly one of the best products one can use for their Subaru WRX engine. It provides so many benefits, something other products fail to do. It reduces the negative impact of the harmful gases which can damage the catalyst. It also has better pairing with fuels which have ethanol present in them.  

The product provides greater protection against unnecessary wear that the engine may suffer from after long uses. It tackles the problem of LSPI which many modern engines suffer from under cold temperatures. It also maximizes the overall fuel economy as it drastically cuts down on the problem of friction. It extends the drain intervals which is always useful. 

It has high alkaline contents which provide an improved protection against the problem of corrosion (as per the industry standard tests.) It protects the engine from the problems of sludge and deposits. The product also is equipped with a hardened seal which helps in preventing oil leaks, a problem which can be seen in some of the other products mentioned in the list. 

Since the product has so many benefits, it is bound to be priced on the higher side which makes it difficult for some customers to afford the product. 

It meets the API SN, ILSAC GF-5, GM dexos1 and is certified by the American Petroleum Institute for its usage in gasoline vehicles. 


Pros
  • Improved wear protection
  • Reduces the LSPI problem
  • Maximizes fuel economy
  • Increased corrosion protection
Cons
  • Expensive product

6.Mobil 1 Advanced Full Synthetic Motor Oil 5W-30

Mobil 1 Advanced Full Synthetic Motor Oil 5W-30

Key Details:

  • Manufacturer: Mobil 1
  • Viscosity: 5W-30
  • Style: Advanced Full Synthetic
  • Liquid Volume: 5 Quarts

The Mobil 1 Advanced Full Synthetic Motor Oil 5W-30 is a high quality engineered by some of the brightest minds at Mobil 1. The product is well suited for the Subaru WRX engine and ensures improved performance for the same. It aids in protecting the engine from the 5 critical problems it faces: wear, sludge, deposits, oxidation and heat. 

It aids in protecting the crucial parts of the engine up to 10,000 miles. It has an amazing flashpoint of 230-degree Celsius. It also protects the engine from the problem of oxidation which can permanently deteriorate the quality of your vehicle’s engine. The product also maintains and prevents the problem of viscosity breakdown. 

It extends the life of the engine by tackling the problem of deposits and sludge which slow down the effectiveness of your vehicle’s engine. It also has an outstanding low temperature protection lasting up to -30 degrees Fahrenheit. Since it has such a low temperature protection, the problem of LSPI can rarely be seen after using this product. It is also equipped with innovative engine cleaners to provide you with an easier driving experience.

This product has a drawback of not providing surpassed oil leak protection in some of the older models which may cause problems.

It meets the ILSAC GF-6A, API SP, SN PLUS, SN, SM, ACEA A5/B5 requirements, is made in the USA and is certified by the American Petroleum Institute for its usage in gasoline vehicles. 


Pros
  • Reduces rusting
  • Extends engine life
  • High temperature protection
  • Protects critical engine parts
Cons
  • May cause oil leaks in older vehicles

7.Shell Rotella T – 550045348 5 Synthetic Blend 15W-40 Diesel Motor Oil

Shell Rotella T - 550045348 5 Synthetic Blend 15W-40 Diesel Motor Oil

Key Details:

  • Manufacturer: Shell Rotella T
  • Viscosity: 15W-40
  • Style: T5
  • Liquid Volume: 128 Fluid Ounces

The Shell Rotella T5 Synthetic Blend 15W-40 Diesel Motor Oil is an amazing product manufactured by Rotella. It has a low ash formulation formula which aids in reducing the blocking of exhausts. This helps in retaining the quality of the engine and does not cause problems in the long term. It is a premium quality heavy-duty motor oil specially designed for high demanding engines.

It helps in achieving excellent cleanliness in the engine. It also protects the piston from accumulating excess dirt in it and thus provides you with a comfortable driving experience. It is fused with base components which help in achieving a decent performance under low temperatures. It also helps in preventing oil breakdowns.

The product is a synthetic blend, thus having some benefits greater than that of conventional oil types. However, it is easily outperformed by some of the full synthetic motor oils mentioned in this list. Also, the winter grade of the product is 15W-40 which is quite higher than that of the recommended amount for the Subaru WRX engine. This might not seem a big problem at first, however will cause critical problems in the long run. It will also be unable to perform as well as the full synthetic motor oils under cold temperatures.

Thus, it is not recommended to use this product for your Subaru WRX.

It meets the API CK-4, CJ-4, CI-4 PLUS, CI-4, CH-4 requirements and satisfies the requirements of some engine manufacturers for low emissions.


Pros
  • Prohibits exhaust poisoning
  • Reduces fuel consumption
  • Improves engine cleanliness
  • 55% better deposit prevention
Cons
  • Not full synthetic

8.Havoline 5W30 High Mileage Synthetic Blend

Havoline 5W30 High Mileage Synthetic Blend

Key Details:

  • Manufacturer: Havoline
  • Viscosity: 5W-30
  • Style: High Mileage Synthetic Blend
  • Liquid Volume: 1.25 Gallons

The Havoline 5W-30 High Mileage Synthetic Blend Motor Oil is another high-quality product. It provides a drastic increase in the mileage of the vehicle. It reduces the problem of corrosion in the vehicle. It provides extra cleansing in the pistons, thus improving the overall driving experience. It is recommended to refer to the manufacturing manual before using the product in your vehicle.

It provides immaculate wear protection in the engine. It also helps in increasing the overall fuel economy of the vehicle. The product is a synthetic blend, thus providing improved benefits when compared to conventional motor oils. It also helps in reducing the overall fuel consumption in the vehicle which reduces the overall cost.

Moreover, it also provides longer drain intervals. It’s deposit shields aim to provide your vehicle with excellent cleanliness and to eliminate any sort of unnecessary waste from it. It also aids in reducing the oil leaks which can lead to higher costs.

The only drawback of this product is that since it is a synthetic blend motor oil, it does not have the benefits of the full synthetic motor oils and the vehicle may not be able to reach its full potential. 

It meets the ILSAC GF-6A, API SP requirements and is certified by the American Petroleum Institute for its usage in gasoline vehicles.


Pros
  • Increases mileage
  • Resists oxidation
  • Increased wear protection
  • Fights against piston deposits
Cons
  • Unable to prevent oil leaks

9.Castrol 06440 GTX 5W-30 High Mileage Motor Oil

Castrol 06440 GTX 5W-30 High Mileage Motor Oil

Key Details:

  • Manufacturer: Castrol
  • Viscosity: 5W-30
  • Style: GTX High Mileage
  • Liquid Volume: 32 Fluid Ounces

The last product on the list is also manufactured by Castrol. As many of the other Castrol products, it meets the requirements of the Subaru WRX perfectly. It is the number 1 high mileage brand and has been specially designed for vehicles over 75,000 miles. It aids in extending the overall life of the engine.

It has elite detergents which aid in reducing the build-up of unnecessary sludge and deposits which can damage the engine. It also provides excellent protection against the problem of oil burning, a problem which many of the products mentioned in this list have. The container of the product has been specially designed to prevent any sort of leaks and are made in a way which is easy to handle. 

The product also deals with the problem of engine wear and reduces it. The problem of Catalytic convertor failure is treated easily by using this product. It is an extremely common problem which if not treated leads to massive repair costs for the user. It also has less phosphorus which prevents the problem of emission system failure. 

A common problem associated with the product is that it leads to poor performance of the pistons as it does not clean them thoroughly unlike some other products. 

It exceeds the ILSAC GF-6, API SP, SN PLUS, SN, SM requirements and is certified by the American Petroleum Institute for its usage in gasoline vehicles.


Pros
  • Decreases deposits and sludge
  • Fights engine wear
  • Special seal prevents leaks
  • Excellent oil burn protection
Cons
  • Deteriorates piston quality

Oil Buying Guide for Subaru WRX

Before purchasing any product, you need to know about some of the important details.

The Viscosity

The viscosity of the engine is one of the most important details one should know about. Every engine requires a different viscosity which can result in varying performances. A thicker oil will be more suitable for vehicles that undergo extreme conditions like poor roads and long drives. The thinner oil type is suitable for cold conditions where the engines might suffer from the problem of poor ignition. The Subaru WRX recommends the 5W-30 viscosity. Any other oil viscosity would result in a poor performance.

The Oil Type

There are 3 major oil types in the market. The conventional, the synthetic blend and the full synthetic motor oils. The conventional oil types are basic oils without any fused base stocks. The full synthetic motor oils have been treated to provide greater benefit for the vehicle. Naturally, the full synthetic motor oil would cost more than the conventional ones. The Subaru WRX recommends using the Full Synthetic motor oil only.

Engine Performance

The engine performance depends on a lot of factors. It can deteriorate incredibly if one uses the wrong oil type in the engine and it will work extremely well if the recommended oil type is used. It all depends on the user.

Extra Features

If all of the above factors did not help you in making a decision, perhaps it is time to pay attention to the additional features a product has. For instance, if a vehicle suffers from the problem of oil burning, then using a product that helps in reducing that problem would be the way to go.

Frequently Asked Questions

The oil should be changed every 10,000 km or every 6 months.

The Subaru WRX requires a full synthetic motor oil for best performance.

The best oil type for the Subaru WRX is the Subaru SAE 5W-30 Ful Synthetic Motor Oil.

Yes, the 5W-30 can be interchanged with a 5W-40.

The Subaru WRX has a capacity of 5.4 Quarts.

The Verdict

The recommended oil type for the Subaru WRX is a full synthetic motor oil with a viscosity of 5W-30. The Subaru SAE 5W-30 Synthetic Motor Oil is the ideal choice to unleash the best performance for your vehicle. However alternatively, the Mobil 1 Advanced Full Synthetic Motor Oil 5W-30 or the Castrol Edge 5W-30 Advanced Full Synthetic Motor Oil can also help your vehicle in attaining a satisfactory performance.

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