Castrol EDGE is our strongest and most advanced range of engine oils. Its TITANIUM FST™ doubles its film strength, preventing oil film breakdown and reducing friction Castrol EDGE 0W-20 LL IV is suitable for use in gasoline and diesel engines where the manufacturer recommends an ACEA C5 0W-20 lubricant. Castrol EDGE 0W-20 LL IV is approved for use in gasoline and diesel engines in vehicles from the VW Group that require a VW 508 00 / 509 00 specification 0W-20 lubricant