Well, it could cause additional fuel in the trim. If it leaks out oilwhen there is crankcase pressure...then it "could" draw in un-metered air under vacuum. But it would be a significant leak. You could check for un-metered air leaking in as in the vid. Clear fault codes...even if there aren't any...start the engine and pull up 032 and 033 again. Is the value in MB block 033 staying above zero or bouncing from pos to neg near zero? Then while running, does the oil cap turn easily and does the engine not stumble or change when you remove the cap?
Generally, a positive multiplicative is from wear, and older engines. This would be when LTFT remains below 10%. But it can be unmeasured air/leaks, less fuel than what is commanded is being delivered (be it fuel pressures or injectors), or sensors are reporting inaccurately. Especially when LTFT exceeds 10%.