What kind of engine is oil efficient?
Generally speaking, small displacement vehicles are less fuel consumption than large displacement vehicles, but this is not absolute. A lot of large displacement cars due to the lighter weight, fuel consumption and other reasons may be more advanced than the small displacement car; also, many domestic small cars because the style is backward, outdated engine and other reasons, is not fuel-efficient.
The engine parameters -- generally the same engine cylinder number, full combustion is more efficient; and the four valve engine will be more than two valve more fuel-efficient, DOHC engine fuel-efficient than single overhead. In addition, the engine of a good linear - power increased evenly, the maximum torque appeared early, the car will be more fuel-efficient.
Drag coefficient - the new models tend to be smoother, but in addition to improving visual performance, it is also important to reduce wind resistance. Many people think that wind resistance is only a tiny technical parameter, but in practice it has a lot to do with fuel consumption. Generally speaking, when a vehicle travels at high speed, the biggest resistance comes from the air. Therefore, even if the drag coefficient is reduced by 0.01, fuel consumption will also bring about great difference.
Many owners choose, often mainly look at the manufacturers to provide the same speed fuel consumption data, determine whether fuel-efficient, in fact, there are many parameters affecting fuel consumption. The weight factors -- influence on a car fuel consumption is actually the biggest weight. At the same distance, the more heavy the car does, the more fuel it needs. People often say that the Japanese car engine fuel, in addition to outside factors, the Japanese car weighs more often than cars in Europe and America light is also a very important reason.
