old gaskets, replace asap or risk losing your engine or transmission or some other catastrophic repair
you fix the leak
no...sounds like an exhaust leak could also be a crack in the manifold
can exhaust manifold leak cause you to burn oil
engine oil leak
No
The starter should be tight! It can cause an oil leak if it hits the oil filter and makes a hole in it (oil filter is like a coke can). If your starter is moving you must first tighten it down it's two bolts.
they leak oil from the oil pump on the front of the engine
A possible leak
If the casing is spilt a filter will leak an incorrectly installed filter will also leak.
put a new motor in. it'll cost about the same as fixing the rear main that is more than likely the cause of the problem.
one way is the headgasket is blown oil can leak into the water jackets and get wixed with the oil
It will continue to leak oil and if you do not add oil regularly it will eventually cause engine damage.