Hi, I have an 88 civic and knocking is coming from under the hood. I
thought maybe the engine was just getting old so I switched to premium
for a while but it has just gotten worse.

It's knocking a lot but I don't think it's the engine as it knocks at
various times not in accordance with how I'm running the engine.

I guess I will take it in but can anyone tell me what I'm probably
facing?

It sounds like it's coming from the passenger side front wheel.

thanks a lot