Mrblazier

I have a loud knocking, not ticking, noise with a little bit of squeal coming from the bottom of engine. It does not go away after warming up. My fuel economy has gotten worse and have a intermittent lack of power during acceleration. There are no codes popping up. Any ideas of what it could be. I change my oil every 2000 to 3500 miles due to active cylinder management and loss of oil.