Oilers/Plant Tenders (HHC) Civil Service Exam 2026 – 400 Free Practice Questions to Pass the Exam

The comparison between a four-cycle diesel engine and a single acting two-cycle diesel engine reveals that the two-cycle engine tends to use more lubricating oil. This is primarily due to the operating principles of the two-cycle engine, which requires lubrication to be mixed with the fuel for adequate operation, leading to an increased consumption of oil.

In contrast, the four-cycle diesel engine operates in a way that allows it to separate fuel and oil more efficiently. As a result, the lubrication happens independently of the fuel intake, leading to lower overall consumption of lubricating oil. This distinction in their operational mechanics underscores why the two-cycle engine is typically associated with higher oil usage compared to the four-cycle variant.

Thus, acknowledging the functional differences in engine design and operation provides a clear understanding of why the statement regarding the two-cycle engine's oil consumption is accurate.