1. Mechanism of Engine Oil Consumption

① When and where engine oil is consumed

   - Flow to a combustion chamber from the space between a piston and a ring (largest amount of engine oil consumed)

   - Discharge along with blow-by gas
   - Consumed by the engine equipment (e.g. air compressor of heavy duty engine)
   - Oil leakage​

② Oil consumption mechanism
   - An oil film of engine oil is formed inside the wall of cylinder, but the oil deposition burns to be released into the atmosphere after being pushed by a piston ring into a combustion chamber.
   - A piston has three or four piston rings. Out of them, an oil ring serves to scrape out residual oil deposited inside the wall of cylinder.  ​

2. Optimum Consumption of Engine Oil

① Engine oil is inevitably consumed for lubrication.
② Consumption of engine oil depends on the size of engine.
   Consumption is proportional to the displacement size of an engine (The area of a piston ring groove determines the volume displaced).
③ Driving habits affect the consumption of engine oil as well as fuel
   High-speed rotation and overload of an engine results in more consumption of oils. ​ 

3. Causes of an abnormal increase in engine oil consumption
① Abnormal wear of a cylinder or a piston ring.
② Scratch that occurs in a cylinder or a piston ring acts as a passage of oils.  ​

4. Solutions
① Use the proper engine oil
② Change the engine oil at proper intervals and use the designated oil filter
③ Check the engine oil and perform maintenance before driving
④ No overloading​