Castrol GTX is a world-renowned engine oil, engineered to protect your engine from daily wear and tear. Severe driving conditions can lead to sludge buildup, which can impair engine performance and longevity. Castrol GTX's Double Action formula actively removes existing sludge and prevents new formation, exceeding industry standards. Extend your engine's life with Castrol GTX. This 5W-30 C4 engine oil is suitable for gasoline and diesel engines requiring ACEA C4 5W-30 lubricant. It is approved for vehicles needing Renault RN 0720 and MB-Approval 226.51 specifications. Benefits include superior protection against engine sludge, advanced defense against viscosity and thermal breakdown, and premium base oils with anti-wear additives to prolong engine life and minimize oil consumption. Specifications: ACEA C4, MB-Approval 226.51, Renault RN 0720.