Castrol GTX 15W-40 engine oil is suitable for diesel engines in light, medium, and heavy-duty trucks.
It helps extend engine life and provides reliable protection against wear under harsh weather conditions, rough roads, and heavy loads.
As a 15W-40 multigrade oil, it flows like a single-grade 15 oil during cold winter starts, while delivering the protection of a single-grade 40 oil once the engine reaches full operating temperature.
