Yesterday afternoon, I noticed that my car had some knocking sounds in the engine. I went to check the oil levels and the engine was bone dry. I had changed the oil two months ago. So I went and refilled the engine with new oil and I still have the same issue. The sound gets worse around 2500- 3000 RPM. I was thinking the engine might be toast. But I wanted everyone's opinion before I did anything. I might rebuild the engine if i have to pull the engine out.