My wife's pacifica is going through about 1qt every 3k. The car only has about 50k on it. PCV valve was changed about 15k ago. It is currently running QSGB 10w-30, the recommended grade. Has anyone tried a heavier grade with these engines? 10/15w-40 perhaps? Maybe 10w-30 HDEO or High mileage? Not that 1 quart every 3k is excessive, but since we are busy folks and my wife refuses to do any operator maintenance, less oil burning is better. If I give up 1/2mpg or so, I really don't care. I just want to minimize oil burning and keep good longevity. Facts are preferred, opinions backed with experience are welcome!