Have tried several brands of high capacity oil filters for my last few oil changes. Specifically the K&N HP-6002 and Acdelco PF932. Was hoping to make it an even 8 quarts for an oil change. My experience is that these 2 only let me add about a half quart or less to bring the level to the full mark. A full extra quart would go well past it. These filters are huge, nearly twice as long as the stock one. I would like to hear from anybody who is/has used a high capacity filter and what your results were. Thanks.