Castrol Magnatec vs Edge vs GTX | Compared

Castrol is one of the leading engine oils manufacturers in the world and it is well-known for its world-class automotive lubricants and oils. Now, Castrol offers a myriad of Engine oils for a variety of purposes. The major sub-brands of Castrol are:

  • Castrol Magnatec
  • Castrol Edge
  • Castrol GTX

Many of you must be in a dilemma about which among the above Castrol Engine oil should you use for your engine. In order to address this issue, we have done a detailed analysis and comparison between the 3 well-known products from Castrol.

Castrol Edge and Magnatec are Full-synthetic engine oils, whereas the Castrol GTX range is available as semi-synthetic and conventional mineral oils. The fully-synthetic Castrol oils (Edge and Magnatec) are advanced engine oils used mostly in performance vehicles, on the other hand, the conventional Castrol GTX is used generally in normal passenger vehicles.

Fun fact– When ‘Castrol’ was originally founded, it was named ‘CC Wakefield and Company’, and Castrol was just the name of the company’s engine oils. Eventually, the company adopted the name Castrol as it became extremely famous.

Comparison Table

Oil TypeFully-SyntheticFully-SyntheticSemi-Synthetic and Conventional
Suitable EnginesGasoline or DieselGasoline or DieselGasoline or Diesel
Suitable ModelsAny passenger carsHigh-performance modern-day carsAny passenger cars
Fuel EconomyMediumGoodGood
Grades Available0W-20, 5W-20, 5W-300W-16, 0W-20, 5W-20, 5W-30, 5W-50, 10W-30, 10W-400W-20, 5W-20, 5W-30, 10W-30, 15W40, 10W-40, 20W-50
Value for money9/108/109/10
Available on Amazon Available on Amazon Available on Amazon


Comparison between Castrol Magnatec, Castrol Edge, and Castrol GTX


Differences You Can’t Ignore:-

  • Features: Castrol Edge is the manufacturer’s most premium engine oil specially designed for performance vehicles although it could be used for general vehicles as well. Castrol Edge is specifically manufactured for modern-day vehicles where the engine is getting smaller and more efficient, which put the engine oil to test with increasing pressure. Castrol Magnatec is made primarily for heavy traffic conditions and short trips.Castrol says that up to 75% of engine wear happens during cold start, Magnatec is very useful in these conditions as it is equipped with ‘DUALOCK technology’ which ensures that the oil particles cling onto the engine components, so that engine wear and tear is reduced. Castrol GTX is standard engine oil that provides great value for its price. It was introduced primarily to extend the engine life and is very effective in cleaning sludge and preventing new sludge from forming.
  • Suitable Models: Although all the 3 products are suitable for high-performance or regular powerplants, there are certain engine oils within the GTX, Magnatec, and Edge range that are specifically designed for high-performance and regular engines respectively. Castrol Edge is designed specifically for modern-day engines. Then, there are a few products that are specifically engineered for high-mileage vehicles.
  • Longevity: After testing all the 3 engine oils through a variety of tests, it can be concluded that Castrol GTX retains its oil properties the longest, after which comes Castrol Magnatec, which also provides good shelf life due to its clinging property. Castrol Edge, even though, being the most premium engine oil in Castrol’s range of engine oils, has the least shelf life and loses its oil properties earlier than the other two.
  • Cost: Being the most premium offering, Castrol Edge is the most expensive out of the 3, Castrol Magnatec is the second most expensive, and Castrol GTX is the cheapest of the lot.




  • Suitable Engines: All of the above-mentioned engine oils are compatible with both gasoline and diesel powertrains.
  • Oil type: All 3 engine oils are available in fully-synthetic forms. While Magnetic and Edge are available only in synthetic forms, GTX is a premium conventional mineral grade oil.
  • Reliability: All the engine oils are thoroughly proven products, and are extensively tested for various conditions. Thus, there are no questions asked over the reliability of these Castrol products.


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Products We Recommend:


1) Castrol EDGE 5W-40 A3/B4 Advanced Full Synthetic Motor Oil

Castrol EDGE 5W-40 A3/B4 Advanced Full Synthetic Motor Oil

Castrol Edge is the most premium synthetic oil in the Castrol range. It was designed especially for modern engines which are becoming smaller and more powerful with time because of which they have to undergo extreme stress. Castrol Edge takes care of this and provides great lubrication and protection from friction. Tagged with fluid TITANIUM technology, it boasts of being the strongest oil in its class.

This particular Engine oil falls under the category of Euro oils engineered in collaboration with European car manufacturers such as Audi, BMW, Volkswagen, and Porsche.

Salient features:-

  • It has been optimized to meet stringent European requirements and has been approved by API CF/SN, ACEA A3/B4, BMW Longlife-01, MB Approval 229.3/229.5, Porsche A40, Renault RN 0700/0710, VW 502 00/505 00.
  • Castrol Edge Euro car fluids have been manufactured with ‘fluid TITANIUM’ technology which provides firm engine protection, reduces friction, and delivers up to 40% better performance as against the industry standards.
  • Its viscosity grade is SAE 5W-40, which means it has a viscosity rating of 5 at winter temperatures, and 40 at operating temperatures (220 degrees Fahrenheit).


  • It is a bit expensive as compared to other engine oils.
  • The longevity of Castrol Edge engine oils is lesser than Castrol Magnatec and Castrol GTX.

– Supercars and Hypercars deserve this most premium offering from Castrol.

Available on Amazon



2) Castrol GTX MAGNATEC 5W-30 Full Synthetic Motor Oil

Castrol GTX MAGNATEC 5W-30 Full Synthetic Motor Oil

When the engine of the car is not in use, the engine oil lubricating the engine is gradually collected in the oil sump. Now, when the engine is started, it takes time for the oil to reach various critical engine components and therefore, the engine has to work for some time without the lubrication of the engine oil. This is the major reason for the wear and tear of the engine.

Castrol Magnatec is a fully-synthetic oil that has advanced ‘DUALOCK technology’ which helps the oil particles to stick to the engine components, therefore when the engine is started, it is already lubricated to a certain extent, thereby significantly decreasing the wear and tear caused to the engine.

Salient features:-

  • It has been optimized to meet stringent industry standards and has been ‘Dexos 1 gen 2’ approved which means that it is specifically formulated to use in General Motors (GM)
  • Reduces Engine wear, keeping the critical engine parts up to 4X smoother.
  • Provides excellent protection in the warm-up of the engine, which is during the first 20 minutes of the engine start, because during this time, the engine is prone to most of the wear and tear.
  • Its viscosity grade is 5W-30, which means it has a viscosity rating of 5 at winter temperatures, and 30 at operating temperatures (220 degrees Fahrenheit).


  • Engine performance is not as good as Castrol Edge engine oils.
  • It is costlier than conventional and semi-synthetic engine oils such as Castrol GTX.

– Castrol Magnatec is a must-have engine oil for heavy traffic conditions.

Available on Amazon


Some important FAQs: 

Is Castrol Magnatec fully synthetic?

Yes, Castrol Magnatec is fully synthetic engine oil with DUALOCK Technology delivering 50% better protection and warm-up engine protection, better wear protection. It is mostly during the first 20 minutes of warm-up; the engine wear is the most. Castrol claims that its Magnatec engine oil reduces the engine wear significantly in those 20 minutes and thus increases the life of the car engine.

Is Castrol Edge fully synthetic?

Yes, Castrol Edge is an advanced fully synthetic oil with ‘fluid TITANIUM’ Technology. It has proven to produce documented performance in friction reduction, anti-wear, and deposit control protection. Fluid titanium technology ensures the high performance and strength of the engine.

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Can I mix Castrol Edge with Castrol GTX?

The official answer is no, or rather best not to. Different oils have different formulations, in particular, the additives which are used and the ratio/proportion as well. Mixing the oil may cause the different additives to cancel out each other and the oil will not provide the protection it is supposed to.

What’s the difference between CASTROL edge high mileage and CASTROL GTX high mileage?

Castrol Edge high mileage is low-cost synthetic oil that offers superb value for your high mileage car. It reduces leakage and oil burn-off. There have been some reports of engine noise.

Castrol GTX’s high mileage comes specifically for vehicles clocking 75,000 miles in the odometer. The oil is made by professionals to help prevent sludge build.

Castrol Edge Vs Magnatec 5W30

Castrol Edge is thinner engine oil in comparison to Castrol Magnatec. As temperature rises Castrol Magnatec is able to maintain a suitable thickness, the Castrol edge gets thinner. Castrol Magnatec has a longer shelf life than Castrol Edge.

Castrol Edge with its Fluid Titanium technology is an expert in handling high pressure and decreasing friction.

In Castrol Magnatec Intelligent molecules are present that cling to the surface which creates the best anti-wear system.

Castrol Magnatec Vs Edge Titanium

Castrol Magnatec has laboratory-made intelligent molecules that cling to critical engine parts like a magnet, providing an extra layer of protection from the start and throughout warmup that won’t drain the sump.

Castrol Edge with its advanced ‘Fluid TITANIUM’ technology provides superior engine wear protection. It offers a high level of high-temperature protection, anti-wear performance, and viscosity stability.

Castrol Magnatec Professional VS Castrol Edge

Castrol Magnatec professional is specifically made in collaboration with Ford motors to meet modern emission standards and fuel economy. It tends to focus mostly on warm-up wear, while Edge emphasizes reducing friction under high-pressure settings. In a general sense, Castrol Edge has a lead over Magnatec Professional since it meets and even exceeds the highest standards of performance, though the protection offered by Castrol Magnatec Professional in heavy traffic conditions and frequent start-stops is unmatchable.

Castrol Magnatec VS GTX ultraclean

Castrol GTX ultraclean is a semi-synthetic engine oil with double action formula that has proven to clean away the sludge which can block engine oilways. It also prevents new sludge formation, thanks to its synthetic technology. In fact, it provides much better sludge protection than is demanded by the latest industry standards.

The fully-synthetic Castrol Magnatec, on the other hand, focuses more on protecting the engine in heavy traffic conditions and short trips.


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Can you Mix Castrol Edge and Magnatec?

The official answer is no, or rather best not to. Different oils have different formulations, in particular, the additives which are used and the ratio/proportion as well. Mixing the oil may cause the different additives to cancel out each other and the oil will not provide the protection it is supposed to.



Undoubtedly, Castrol is one of the finest engine oil brands that one can find. But, the Castrol range of engine oils is itself so extensive that one needs to assess its driving type and conditions in order to find the best possible engine oil.

Castrol Magnatec is the best friend for engines that undergo heavy traffic conditions and frequent start-stops. Castrol Edge is suited for those looking for exhilarating performance for their modern-day cars. Castrol GTX range of oils meets the demand of everyday drivers looking for exceptional reliability and engine protection.