MY CAR WAS LEAKING OIL AND IT STARTED MAKING KNOCKING NOISE WHAT IS I

take it to an accredited service shop that has experience on your make of engine and have a proper diagnosis done and quote
it is possible that there is a spinning main bearing and the test is a oil pressure test using a mechanical gauge
some times it spins , low oil pressure -knocking other times it stops and the oil pressure goes back up , knocking stops
should I be correct , normally it can be repaired in car by removing the sump and replacing that bearing shell, of the shaft is not damaged
i would steer away from a new engine or suggestions of a blown engine but it could be serious

Check the oil pressure manually with a gauge. Make sure you have oil pressure. Perhaps you need a new oil pump, or new lifters. Get a professional opinion from a non interested party. Save money, get a diagnosis.

Check to be sure oil filter s the right one, not leaking or clogged. No leaks, no sludge last but not least ur oil pump could be failing. Start with the simplest ones, check for oil leaks, check oil filter(it might be clogged) some rare cases oil pressure switch or sensor leaks occur too. Not visible unless u looking right when the cars on.

best advice here is to ask a local mechanic to have a look as engine shouldnt have started knocking with teh new oil in unless someone has put tranny fluid into teh engine or something stupid ,the lights for the airbag shouldnt be connected but the oil light ?? Do not drive car untill a mechanic has come around and checked it out for you though as this oil light coming on and knocking noise is serious

if it gets louder and faster as the engine speed increases then a piston is knocking...if it is just at idle like you said then it could be a bad oil pump if oil light is on at idle or it could be the connecting rod knocking on the crankshaft because it is loose.

If the oil has been changed, why are you putting more oil into the engine? Does the engine use/burn oil, or have an oil leak? If you have none of these problems, then you may be overfilling the engine which is just as bad as no oil.

check oil level .was correct oil put in engine

Is it a ticking or knocking noise? or does it sound like something is leaking could be a bad manifold gasket which would be better than a ticking or knocking.

The rod knocking is caused by loss of oil pressure. Did the oil light not come on? That light is red, red means stop. Do not start this engine again until the problem is corrected.

Have you checked the oil level?

noise is caused by lack of oil to lifters, or worn timeing chain. if noise is from lifters it should go away wit proper oil level, if still there needs timeing chain.