calorific value of oil
low heat value of
high heat value of oil
mean heat value of oil
low 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.