Check this out! Just brought home this Dodge dakota with the 3.9 V6. Each valve cover has an oil adding hole. This gives me the practicality of letting one bottle drip dry while pouring the next in on the opposite side. But could you imagine doing changes with your sweetie, each standing over one side of the engine? Maybe if and when I sell this heap, I'll tell the buyer you have to put two quarts in each side or it'll be off balance.