Castrol® GTX® is a premium conventional engine oil that's been helping extend engine life since 1968. Its double-action formula clears sludge and stops sludge forming.
Sludge can block your engine’s vital oilways like cholesterol, and if untreated, can rob an engine of its power and ultimately its life.
Castrol® GTX® is a premium conventional engine oil that has been helping to extend the life of engines since it was first introduced in 1968. Its double-action formula cleans away old sludge and prevents new sludge formation even more effectively than tough industry standards demand.