With TITANIUM FST™ technology, Castrol EDGE 0W-40 A3/B4, helps get all the power out of the high-revving engines in modern sports and luxury cars and high-performance vehicles that require more effective protection and higher-performance, low-viscosity oils.
Castrol EDGE 0W-40 A3/B4 is suitable for automotive gasoline and diesel engines for which the manufacturer recommends ACEA A3/B3, A3/B4, API SN/CF or earlier viscosity 0W-40. Castrol EDGE 0W-40 A3/B4 is approved by many car manufacturers, check your car's owner's manual for approval requirements.