I have recently bought a ford focus 1.6 petrol 51 plate roughly 155k miles when revving the car you hear a strange knocking sound top of Engine and when I drive this knocking is noticeable when hitting 2500 to 3000 revs while driving higher the gear less strain but when car is idle it's quiet. I have recently put the right oil in as well but was happening before I put oil in. Any ideas ?
My car has 155000 miles.
My car has a manual transmission.
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