I was leaving work today, heard a slite knocking.. pulled over to check it out... checked the oil.. bone dry.. checked under the car.. for some reason the oil filter was leaking.. put oil in, went down the road got new oil filter and oil.. changed it in the parking lot.. knock was gone.. went home got off the freeway.. knock was LOUD at idle and through the RPMs. PLEASE i need help. I have 84000 miles on it.