The ACEA B4 performance requires an outstanding detergent/dispersant power and better viscosity increase resistance due to soot produced by Direct Injection Diesel engines (except VW unit injector engines that require a VW 505 01 product such as Motul Specific 505 01 product such as Motul Specific 505 01 502 00 505 00 5W-40 0r 8100 X-Clean 5W-40).