Valvoline Premium Blue One Solution 15W40 is the only oil exclusively endorsed and recommended by Cummins.  It is made to provide performance and protection in several Heavy Duty engines including urban bus, delivery truck and others that are fueled by gasoline and natural gas.  Also can be used in modern, emissions treatment equipped diesel engines.  This premium lubricant is made to protect engines fueled by diesel, natural gas, or gasoline under severe service for both on and off highway applications.

Specifications:
Cummins CES 20092, CES 20086, CES 20085
Detroit Diesel DFS 93K222
Volvo VDS-4.5
API CK-4, CJ-4, and SN
Mack EOS 4.5