If a CJ-4 engine lubricating oil was used in place of an FA-4 oil, which of the following might result?
A) exhaust valve damage
B) turbocharger damage
C) exhaust gas recirculation (EGR) system damage
D) reduction in fuel efficiency

Question

Quizplus · Accepted Answer

CJ-4 and FA-4 oils are designed for different types of engines and have different properties. FA-4 oils are typically lower viscosity oils designed for newer engines to help improve fuel efficiency. Using a CJ-4 oil, which is generally thicker, in place of an FA-4 oil could lead to a reduction in fuel efficiency due to increased friction and less effective lubrication at the designed operating temperatures.

If a CJ-4 Engine Lubricating Oil Was Used in Place