IT'S MORE THAN JUST OIL. IT'S LIQUID ENGINEERING.

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  7. ADVANCED TECHNOLOGY

GTX FULL SYNTHETIC ADVANCED TECHNOLOGY

Driven By Advanced Technology
The American Petroleum Institute (API) includes multiple tests to measure a lubricant’s performance.  To be certified against the industry standard, the oil must achieve the minimum value of the test limit. Castrol’s line of premium engine oils far exceed these industry standards, ensuring the highest level of protection and performance for your car. 
Protection Against Sludge (1.3X better sludge protection)
Environmental factors such as poor fuel quality, hot weather and stop-start driving conditions can lead to sludge build-up in your engine. Sludge is a thick, tar-like substance made up of dirt and other deposits that can block vital oilways in the same way that cholesterol clogs arteries. Sludge is an issue that reduces engine life, power and fuel economy.  And it doesn’t just affect some engines, eventually it affects all of them.
Protection Against Sludge (1.3X better sludge protection)
Metal –To – Metal Contact (6X Better Wear Protection)
One of the key functions of a motor oil is to prevent metal engines parts from coming in contact with one another. The area between the cam shafts and cam lobes relies on a very thin layer of protection and is the most likely site for metal-to-metal contact to occur.  When these surfaces contact each other, the result is wear and fatigue of critical engine parts which can reduce engine performance.
Metal –To – Metal Contact (6X Better Wear Protection)