Owners manual

Lubricating Oil Recommendations and Specifications QSB4.5 and QSB6.7
Page V-10 Section V - Maintenance Specifications
Use of "synthetic engine oils" (those made with API group 3 or group 4 base stocks) is permitted subject to the same
performance and viscosity limitations of petroleum (mineral) based engine oils. The same oil change intervals must be
applied to synthetic oils that are applied to petroleum (mineral) based engine oils.
For further details and discussion of engine lubricating oils for Cummins® engines, refer to Cummins® Engine Oil
Recommendations, Bulletin 3810340.