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Castrol GTX 15W-40 A3/B3 Contains anti-sludge formula that provides 25% better sludge protection compared to tough industry standards**API SL, ACEA A3/B3
ACEA C4 5W-30 lubricant as well as Renault RN 0720 approved 5W-30 and MB-Approval 229.31 / 226.51 approved 5W-30 lubricant.
Castrol GTX Ultraclean: Provides 50% superior sludge protection compared to tough industry standards* * 50% cleaner than the industry standard as measured in the API SN Seq. VG Sludge test