Two technicians are discussing engine lubricants. Technician A says that many oil filters have check valves to prevent oil drain back during engine shutdown. Technician B says that any oil weight is acceptable for an engine. Who is correct?
A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

Technician A is correct. Check valves in oil filters prevent oil from draining back into the oil pan during engine shutdown, which maintains oil pressure at startup and reduces engine wear. Technician B is incorrect. Engines have specific oil weight requirements, and using an incorrect weight can cause engine damage or decreased performance.

Two Technicians Are Discussing Engine Lubricants