i have a 2002 dodge dakota 3.9 liter v6 and am having oil problems. the owner before me had overfilled the oil, that problem has since been fixed. but now i go through way too much oil. i put 3 and a half quarts in at the beginning of the month and the dipstick is telling me to add more now, where is my oil going, no leaks, no smoke , no burning oil smell, its just disappearing, can you help me?