The lubrication system lubricates, cools, and cleans the:

The lubrication system lubricates, cools, and cleans the:

• A. exhaust.
• B. drive train.
• C. engine.
• D. all of the above.

Answer: (C)

The engine lubrication system is designed to keep the engine’s moving parts sliding smoothly, to absorb and carry away heat, and to help remove contaminants. Oil coats bearings and pistons to reduce friction and wear, moves heat away from hot surfaces to keep the engine from overheating, and carries dirt and metal particles to filters so the engine stays clean inside. Exhaust isn’t lubricated; it’s a high-heat gas path. The drive train has its own lubrication (transmission, differentials, etc.), separate from the engine oil, though some components may receive lubrication from other sources. So the engine is the entity that fits all three roles described.

The engine lubrication system is designed to keep the engine’s moving parts sliding smoothly, to absorb and carry away heat, and to help remove contaminants. Oil coats bearings and pistons to reduce friction and wear, moves heat away from hot surfaces to keep the engine from overheating, and carries dirt and metal particles to filters so the engine stays clean inside.

Exhaust isn’t lubricated; it’s a high-heat gas path. The drive train has its own lubrication (transmission, differentials, etc.), separate from the engine oil, though some components may receive lubrication from other sources. So the engine is the entity that fits all three roles described.