Castrol Ultraclean 5w30 - 6/1 quart

Castrol GTX Ultraclean's synthetic blend technology - with its proprietary sludge buster - is our cleanest GTX ever. It's unique Double Action formula cleans away old sludge** and protects against new sludge formation, giving you more control over today's challenging conditions.

Environmental factors such as poor fuel quality, hot weather and stop-start driving conditions can lead to sludge, varnish and carbon build-up in your engine: three factors that reduce engine life, power and fuel economy. Castrol Ultraclean is a synthetic blend engine oil available in 0W-20, 5W-20 and 5W-30 grades. Its double-action formula has been proven to clean away the sludge that can block engine oilways and helps prevent new sludge formation thanks to its synthetic technology.

Castrol GTX Motor Oil, SAE 5W-30 - 1 qt

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Castrol GTX Ultraclean is our cleanest GTX ever. The unique Double Action formula cleans away old sludge and protects against new sludge formation giving you more control over today's environmental challenges. The modern world creates difficult challenges for engines. Poor fuel quality heat and tough driving conditions can all lead to sludge that potentially shortens engine life.

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Castrol GTX Ultraclean Synthetic Blend Engine Oil 5W-30 1 Quart Reviews

Castrol GTX Full Synthetic 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 loads on critical engine parts and create engine wear. Environmental factors like heat can lead to sludge varnish and carbon buildup in your engine.