Are Diesel Cars More Fuel-Efficient?

[LeAiden]

Compared to gasoline cars of the same displacement, diesel cars can save nearly one-third of fuel consumption. The noise level has also improved significantly compared to before. However, domestic diesel engines can maintain good performance for two to three years, after which the noise will noticeably increase, and fuel consumption will slightly rise. Reasons for fuel efficiency: Diesel cars are indeed more fuel-efficient because diesel engines use compressed air to heat the air. When the air temperature in the cylinder exceeds the ignition point of diesel, diesel is injected, allowing the atomized diesel to combine with the high-temperature air and burn to release energy. Since no ignition is required, diesel engines have a higher energy conversion rate, making them more fuel-efficient than gasoline engines of the same displacement. Reasons for not being widespread: As for why diesel cars, despite being more fuel-efficient, are not as popular as gasoline cars, there are two main reasons. First, refueling is inconvenient. Second, diesel engines are too noisy. Refueling is inconvenient because diesel cars require lower freezing-point diesel in winter, and strict anti-freeze measures must be taken since the diesel in the tank can easily freeze, leading to problems if not handled carefully.