95 S320 leaking oil from the exhaust manifold

[MyCarIsWilhelm]

I have 95 S320. The check engine light is on and have run the codes on it. I can not remember what the codes were exactly but i know I have some bad vacuum lines and I think my fuel pressure was a little off. My big problem is that I am leaking lots of oil! I keep pouring in new oil all the time but most of it seems to just flow right out within the next couple days of light driving. I have targeted this leak to the exhaust manifold. It is leaking right at the bottom of the exhaust manifold gasket. Shortly after I start the car, I get a small amount of white smoke flows up from that spot as well. I have considered replacing the manifold gasket to stop this leak but I have been told that cracking the bolts on the manifold is almost definite. I don't know why my exhaust manifold would leak oil because that is supposed to just have exhaust fumes in it, correct? Does anyone know why this would happen or what I can check to find the source of my problem?
I have ruled out a bad head gasket because there are no signs. No mixed oil or coolant, no smoke flowing out the tailpipe, no pieces of gasket in the tail pipe either.
The engine temperature runs a little high when stopped for a while. I have already replaced the radiator because of a bad oil cooler valve, the thermostat, and the water pump.
Can blocked or bad vacuum lines create problems with airflow out of the engine and make it hotter?