lock plus

CK-4 Synshield

Extensive testing results show that the new line up of Schaeffer's Synshield CK-4 diesel engine oils offer significant improvements over CJ-4 oils:

71%-85% less wear than CJ-4 oils

46%-77% less deposits and soot than CJ-4 oils.

Schaeffer's CK-4 oils meet the Ford WSS-M2C171-E specification.