Need some advice from you guys.Six months ago i changed my oil in my 2008 Dodge Dakota 4.7 and on the clock it has 900 plus mile into it..Manual says change oil at 7,500 or 6 months and its 6 months now..i dont drive the truck too much but i was thinking the add packs may be depleated in the oil..so question is should i just change the oil or just run it for 7,500