Although I've always preferred a little more zinc in my oil, that's not my reasoning behind choosing this product. I like the moly and boron content that RDY4WAR spoke of, as well as the lubricating properties of the Penn crude source base stock. At the moment the 3400 in my car has not consumed more than a half quart in 5000 miles, this last interval it consumed no discernible amount at all. I'm not particularly concerned about the converter.