This Castrol GTX Ultraclean delivers a blend of the highest quality base stocks and innovative additives packages to deliver a class-leading semi synthetic 10W-30 oil, formulated to keep your engine running safely and smoothly for the long run. Advanced thermal breakdown and viscosity protection ensures that this car engine oil operates at Castrol’s high standards even under the high demand presented in modern petrol engines, meeting the stringent ILSAC GL-5 energy conservation specification to ensure high fuel efficiency while preventing engine wear.

Suitable for use where 10W-30 API SN or earlier specification oils are recommended this product delivers class-leading engine cleaning capabilities, proven to clean away existing sludge deposits and reduce the chance of them reforming by up to 50% compared to other oils meeting this specification. The advanced Double Action cleaning formula keeps your engine purring, so before your next service make sure you grab a bottle of Castrol GTX Ultraclean Semi Synthetic Engine Oil.