API CJ-4 oils exceed the performance criteria of API CI-4, CI-4 PLUS, CH-4, CG-4 and CF-4 and can effectively lubricate engines calling for those API Service Categories.

While CJ-4 oils are being developed specifically to be compatible with exhaust aftertreatment devices, they will also provide better soot-handling capabilities and oxidation control. In short, they’ll offer increased overall performance and better protection for the new engines – and will protect older vehicles, too.

Extensive testing by Lubrizol has demonstrated that API CJ-4 is backward compatible, which means API CJ-4 oils can be used in older-model vehicles as long as the oil analysis is closely monitored and the appropriate maintenance schedule is maintained based on lubricant quality.