All that sounds very excessive. I think you have a plugged vent.

The engine crank case needs to equlize the pressure between the atmosphere and the oil pan while the engine is turning. the pistons create vacume when cycling.

There are things you can try to diagnose your problem to evaluate and be a little informed before going to the shop.

Unhook the hose that comes from the valve cover or crankcase. Start the car look for smoke at the line, feel the end while the car is running should be pressure or vacume change the RPM and note what happens.

If your car has a pcv valve, check it to see it is free(sounds like a ball in a can when shook lightly, if not wash it in gas and try again or buy a new one) a egr valve depending on the engine style, can cause excessive crank case pressure. A plugged vacum line or vent can cause excessive crank case pressure. Valve guides dont cause high crank case pressure unless they are extremely worn like changing spark plugs every month to keep the car running.

You can also take off the oil cap on the valve cover and put your hand over the hole. Run the engine rpm up a little and you should feel slight vacum. If you feel pressure(Bad) or see lots of oil smoke coming out of the hole this is very likely ring blow bye and the above responses are likely. Im a optomist first.