Why does fuel consumption increase after car maintenance?

The first is the oil problem. Whether it is improper operation when changing oil or using oil with high viscosity, it will increase fuel consumption, even during the oil change process, and fuel consumption may still rise. We know that the higher the viscosity, the better, but it is not suitable for our car. The function of oil is lubrication, and the higher the viscosity, the better. If the viscosity is too high, the engine will produce greater resistance when running. Naturally, it will consume more power and fuel consumption will be higher than before.

The second reason is that when we replace the spark plug, we may replace the spark plug that does not match our car. The model of each car is different, and the product accessories are definitely different. Some 4S stores use spark plugs that don't match your car to save time. After this happens, the ignition point of our car will be reduced during ignition, and more gasoline must be used to support it at this time. If the spark plug is not tightened according to the standard torque specified by the manufacturer, air leakage will occur, resulting in engine weakness and unstable idle speed.

The third reason is that the throttle opening becomes larger. When cleaning the automobile throttle, the carbon deposit inside will be cleaned up, and then the throttle opening will become larger, so a certain adjustment process is needed. In addition to the above reasons, there is another reason that most people don't notice, that is, there is something wrong with the air filter. If inferior air filter is selected, intake resistance will increase, engine power will decrease, not only fuel consumption will increase, but also carbon deposition will easily occur. Although maintaining a car can increase its service life, if the maintenance method is wrong, it will increase the fuel consumption of the car. Automobile maintenance is a university question. If you want to make the car more durable, you must maintain it in the right way.