injectors cleaning

In my opinion, Scotty Kilmer is a psycho and I wouldn't do anything he suggests. The additive to the tank is OK as a preventative but it will not correct a problem. They make a pressure system with a professional chemical for cleaning if needed but I would be very surprised if your 07 had plugged injectors.

The injectors of my car are not plugged.i just want to improve efficiency of my car.

It's a good preventative but don't expect any change in the mileage or performance on that one.

i also have hyundai santro.the problem with it is that radiator is not getting input from bottle in which collent is kept.i have changed radiator pressure cap and cap of bottle of collent but still there is no response.The piping is also not plugged.

Please start a different question for a different problem.

There's a real good chemical available for cleaning injectors and the rest of the fuel system. I don't know what it's called, but it comes in the cheapest and most expensive gasoline you can buy. There's no need to buy more of it. As Wrenchtech suggested, you aren't going to solve a pre-existing problem by adding "mechanic-in-a-can". All it's going to do is make you feel better. If by some slim chance a chemical caused an injector to flow more fuel, (what I assume you mean by more efficiency), the Engine Computer will simply adjust to pulse them open for a shorter period of time. More fuel needs more air which results in a higher engine speed which causes you to ease up on the gas pedal which causes less fuel to enter the engine; so what good did increasing the flow rate do? Very few running problems today are caused by injectors. When searching for the cause of those most elusive problems, injectors are way at the bottom of everyone's list of suspects.

I believe you're referring to Techroline Doc

Very possible. All I know is everyone seems to be having little injector trouble these days. I've been to some of the classes where they promote their cleaning systems that run the engine on a "soap" after disabling the fuel pump, and some people swore their engines ran smoother, but that was at least five years ago.

That will help if the injector was clogged in the first place but this one isn't. Adding to the tank only helps as a preventative.