Technician A says that since the introduction of EGR on diesel engines, OEMs have greatly extended recommended oil change intervals. Technician B says that CJ-4 engine lubes are designed for DPF engines but are not effective when used on EGR equipped engines. Who is correct? 

A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B


Answer: D

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