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.

Castrol® GTX® high mileage engine oil is a synthetic blend oil, for cars with more than 75,000 miles on the odometer. Available in 5w30, 10w30 & more.

Castrol GTX is a premium conventional/synthetic blend motor oil that’s been helping to extend engine life since 1968. Severe driving conditions such as heavy traffic, poor fuel quality, harsh …

Castrol GTX motor oils have been protecting engines and helping extend their life for over 50 years. Our superior formula fights sludge build-up, a leading cause of engine wear, keeping …

Find the right Castrol GTX Synthetic Blend 5W-20 Motor Oil 1 Quart for your vehicle at O'Reilly Auto Parts. Place your order online and pick it up at your local store for free.

Castrol Ultraclean is a synthetic blend engine oil available in 0W-20, 5W-20, and 5W-30 grades. Its unique double-action formula has been scientifically proven to effectively cleanse and …

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 …

Castrol® GTX® 20W-50 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 …

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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 …