After cleaning up the carbon deposit and throttle, the fuel consumption will rise instead of falling.

That's all from auto repair shops and 4S shops. At present, there is no 4S shop or auto repair shop to clean the carbon deposit on the valve and piston, but the main factor affecting fuel consumption and intake is the carbon deposit on the valve, because when intake and injection, it passes through the valve first. If there is carbon deposit on the valve, part of the sprayed engine oil will be absorbed by the carbon deposit on the valve and cannot participate in combustion. Flower oil, of course.