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Castrol® GTX® is one of the world’s most trusted engine oils. Severe driving conditions can cause the build up of a thick, tar-like substance called sludge. Sludge can block your engines vital oil-ways like cholesterol – and if untreated it can rob an engine of its power and ultimately, its life. Castrol GTX Double Action formula cleans away old sludge,* and protects against new sludge formation better than tough industry standards. Help extend the life of your engine with Castrol GTX. *When tested in engines with high level of deposits
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