Cleaning agents for engine lubrication system, throttle intake system and fuel system, do cleaning agents have any effect?

Cleaning agent of lubricating system cleans lubricating oil passage, improves oil pressure and protects mechanical parts from premature wear. The cleaning agent of the intake system cleans the intake pipe, removes the carbon deposit at the top of the valve and piston, ensures a good mixture supply of the engine, improves power and reduces fuel consumption. The above two detergents must have brands, and the general price is around 100. Cheap cleaners don't work, but will damage the engine.