calorific value of oil

low heat value of oil

high heat value of oil

mean heat value of oil

the friction is high

the friction is unpredictable

the small difference in cooling water temperature or in internal friction has a disproportionate effect

the engine is rarely operated

larger

slowed down

smaller

liquid

2-stroke cycle engines

4-stroke cycle engines

aeroplane engines

high efficiency engines.

same

less

more

variable