Castrol® GTX® is a premium conventional motor 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 specially engineered to prevent harmful build-up of sludge while protecting against new oil splatter formation better than tough industry standards.

Castrol GTX Full Synthetic provides maximum protection against the impact of severe driving conditions, like heavy traffic and frequent, short trips, that can shorten engine life. It reduces engine wear 6X better than the industry standard.

Castrol GTX Full Synthetic 5W-20 motor oil provides maximum protection to help fight the impact of severe conditions that can potentially shorten engine life. Tough driving conditions like idling on congested highways and frequent, short trips put peak …

Buy Castrol GTX Ultraclean 5W-30 Synthetic Blend Motor Oil, 5 Quarts: Motor Oils - Amazon.com FREE DELIVERY possible on eligible purchases

6X better wear protection on critical engine parts than industry standards** 1.3X better sludge protection than industry standards* 3X Stronger against viscosity breakdown than leading full synthetic^ Protection for 10,000 miles between oil changes *As measured in Sequence VH sludge test vs. API SP limits

Castrol® GTX® High Mileage 10W-40 is the #1 consumer high-mileage brand of motor oil. It's a synthetic blend engine oil that helps extend the life of engines by protecting against sludge, wear and burn-off.

Castrol® GTX® 10W-30 is a premium conventional motor oil that has been helping to extend engine life for over 50 years. It is specially engineered to prevent harmful build-up of sludge while protecting against new oil splatter formation better than tough industry standards.

Motor Oil; SAE 10W-40; 1 Quart; Castrol GTX is a premium conventional motor oil that has been helping to extend engine life for over 50 years. It is specially engineered to prevent harmful build-up of sludge while protecting against new oil splatter formation better than …