motor oil

just the oppisite,, the tolerances are getting looser,,, better mileage,,,
i see it with my wifes new pacifica,,10w30 car takes 5.5 quarts,,,car has 6000 miles on it first oil change i did was at 2500.. second at 6000,,manufracture calls for 6000 miles between service when i drained the oil,,and dumped it back in to the 5 quart bottle,,remember the car holds 5.5 quarts,, it didnt seem to have more then 4 quarts in it,,new cars loose tolerances,, useing oil,,