Castrol GTX Ultraclean’s synthetic technology has superior performance. Its Double Action formula cleans away old sludge, and protects against new sludge formation, giving you more control over today´s challenging conditions.

Help extend the life of your engine with Castrol GTX Ultraclean.

Castrol GTX Ultraclean 10W-40 A3/B4 is suitable for use in automotive gasoline and diesel engines where the manufacturer recommends an ACEA A3/B4, A3/B3, API SL/CF or earlier specification 10W-40 lubricant.

Castrol GTX Ultraclean 10W-40 A3/B4 is approved for use in vehicles requiring MB-Approval 229.1 and VW 501 01/ 505 00 specifications or that Meets Fiat 9.55535-D2 or Fiat 9.55535-G2

Provides 50% superior sludge protection compared to tough industry standards*
Advanced protection against viscosity and thermal breakdown
Superior protection against high temperature deposits
Premium quality base oils and anti-wear additives that help extend the life of your engine

* 50% cleaner than the industry standard as measured in the API SN Seq. VG Sludge test