K. Chao

API CI-4: The First Oil Category for Diesel Engines Using Cooled Exhaust Gas Recirculation

C. Passut, L. Williams, J. A. Mc Geehan, 2002 .

API CJ-4: Diesel Oil Category for Pre-2007 Engines and New Low Emission Engines Using Cooled Exhaust Gas Recirculation and Diesel Particulate Filters

W. M. Kleiser, C. Passut, E. Santos, 2007 .