Castrol GTX Modern Engine 15W-40 offers 25% greater sludge shielding and 50% better high temperature wear protection than industry standards demand to ensure improved operating efficiency and performance in modern engines. The anti-wear formula ensures a long, healthy life for your engine with excellent sludge reduction properties, durable high temperature and pressure defence and extended oil drain intervals. Experience improved fuel efficiency with less oil consumption and ultimate security protection for turbo chargers, multi-valve engines and catalytic converters.