Oil consumption is greater in a:

In a two-stroke cycle engine, oil consumption is greater due to the design and operation of the engine. Unlike four-stroke engines, which have a separate lubrication system where oil is not mixed with fuel, two-stroke engines often require oil to be mixed with the fuel for lubrication purposes. This is because the two-stroke design allows for combustion and exhaust to happen in a single stroke of the piston, which means that oil must be continually mixed in with the fuel to ensure the engine components remain lubricated as they operate.

As a result, two-stroke engines tend to consume more oil compared to four-stroke engines, since every time fuel is consumed, oil is also consumed in the mixture. This design inherently necessitates higher oil consumption, leading to a greater total usage of oil over time. Other engine types, such as diesel or hybrid engines, have more efficient lubrication systems that do not result in such high oil consumption compared to two-stroke engines.