What is the viscosity grade of the oil you are using? Do you have to add oil between services? Any tune ups done recently? First check the condition of the PCV and get it cleaned, if not done already, before suspecting the oil baffles and make sure you have a negative pressure in the crank case by doing the bag test (but it will not give you a clue on oil baffles). Then you have two connections from the cam cover to the air inlet path. One connected between air filter and throttle (this is the breather hose) while another one connected through PCV and the throttle body after the throttle. Inspect inside of the breather hose for excess oil deposits. If that's the case, you have sufficient ground to suspect oil baffles. In any case given the age of the engine it is worth cleaning the cam cover oil baffles, PCV, OCV screen etc. which are usually overlooked in a standard tune up.