During normal running, crankcase pressure varies as the pistons move. This pressure should be vented through the breathing system, so even a loose dipstick should only weep a little.
The breathing system should be checked to ensure it is all as it needs to be, not restricted. If the system breathes into the engine intake, there is usually some system to condense the oil and prevent it being sucked through and burnt. Might be a little gauze filter or similar. If blocked, crankcase pressure may not vent properly and push past the dipstick.
The breathing system should be checked to ensure it is all as it needs to be, not restricted. If the system breathes into the engine intake, there is usually some system to condense the oil and prevent it being sucked through and burnt. Might be a little gauze filter or similar. If blocked, crankcase pressure may not vent properly and push past the dipstick.