High fuel consumption

Hello, I’m doing this the way this is usually done. *ironiemode_an* My engine consumes a lot of petrol. My neighbor’s consumes less. Strangely, it only consumes a lot when I drive with it. I haven’t tried the search function yet, others can do that for me. Should I now increase the air pressure or can it be due to other things. I assume the noise development from the engine room that the running engine has something to do with it. Should I turn it off? Has anyone ever done this before? I’m really desperate….