Lucas cj 4 oils are blended with premium lucas additives that help maintain the life of the emission control system as required for regulatory compliance one can expect less oil consumption and reduced engine wear it resists oxidation and thermal breakdown for total protection in new and older engines suitable for gasoline as well as diesel meets or exceeds recommendations for the following api cj 4 ci 4 cf sm acea e7 recommended for use in all 2007 compliant engines specifying cj 4