Castrol GTX boasts cleaning power unrivalled by any other engine oil, designed to provide the very best protection to older engines and those prone to build ups of sludge and deposits. Engine sludge is one of the key causes of engine deterioration and a loss of power, making keeping your engine's vital passages and pathways as clear as possible. If the engine is the heart of your vehicle, Castrol GTX is here to clear it of bad cholesterol. For this reason, oils like Castrol GTX 15W40 have long been successful with many of the world's most discerning drivers.
In order to do this, Castrol GTX uses a unique double action formula that not only clears away sludge and deposits, but also leaves a protective layer to prevent the build up of new ones. Castrol GTX is also formulated with the best base oils and anti-wear additives to ensure that your engine is constantly protected and set up to lead a long, healthy life.
It's no wonder that GTX was Castrol's flagship oil for such a long time. With a range of oils that are made to suit both modern engines and high mileage vehicles, Castrol GTX is an outstanding entry-level choice at a great price.