Actually all car since about 1980 have been sensitive to whether or not the oil
cap is on.
It does not have to do with starting exactly but the crankcase breather is
hooked up directly to the intake manifold, and if the oil cap is off, it will
greatly lean out the air/fuel mixture by creating the equivalent of an intake
Whether or not the car still starts depends on the type and condition of PCV
valve, as well as the size of the breather hose.
Even the dipstick can make a difference, if it is not seated well.