Difficult driving conditions such as heavy traffic, poor fuel quality, poor driving conditions and longer intervals between oil changes can cause a thick, tar-like substance called sludge (sludge) to build up. 

Thick sludge (sludge) can block your engine's critical oil passages, the same way cholesterol does, and if left untreated can reduce engine power and ultimately engine life.

Castrol GTX's dual-action formula removes thick sludge (sludge) from the oil and protects against new sludge formation better than strict industry standards*.

*Important Note: The mentioned specifications and compatibilities have been taken from the official pages of the manufacturers. Consult your engineer/technician for the correct product selection.