I have a Dart in the shop now that came in with a complaint of the engine shutting off. I found that it was 3.5qt low on oil. I found that the 2.4 Multiair does have a pcv valve in the end of the valve cover next to the throttle body. The valve on this car looked to be ok, but I don't like the hose setup. The hose runs down hill to the intake manifold so any oil that gets through the valve is assisted by gravity in getting to the intake. The vacuum pump can also be a source of oil consumption, some of the Darts had a recall to install a new line from the vacuum pump to the brake booster. The brake boosters were getting contaminated with oil. The recall did not apply to this car, the line from the pump Teed off to the intake manifold which could also cause increased oil consumption if oil is getting through the pump. The other issue with the vacuum pumps are air leaks, our service information states that vacuum leaks can cause the pump to pressurize the crankcase.
I want to say that the service info also stated that oil consumption of up to 1qt per 1000 miles was acceptable for an engine with 50,000+ miles. If I remember correctly.