Castrol GTX Car Engine Oil 5W-30 RN17, 5W-30 C4, or ULTRACLEAN 10W-40 1, 4 or 5L

Castrol GTX is one of the world’s most trusted engine oils. It's more than just oil. It’s liquid engineering that protects against the problems your engine faces every day. Severe driving conditions can cause the build up of a thick, tar-like substance called sludge. Sludge can block your engine’s vital oilways like cholesterol - and if untreated it can rob an engine of power and, ultimately, its life. Castrol GTX Double Action formula cleans away old sludge*, and protects against new sludge formation better than tough industry standards Help extend the life of your engine with Castrol GTX. Castrol GTX 5W-30 C4 is suitable for use in automotive gasoline and diesel engines where the manufacturer recommends an ACEA C4 5W-30 lubricant. Castrol GTX 5W-30 C4 is approved for use in vehicles that require a Renault RN 0720 approved 5W-30 lubricant. Castrol GTX 5W-30 C4 is approved for use in vehicles that require a MB-Approval 226.51 approved 5W-30 lubricant Provides superior protection agains