correct me if im wrong..but the filter is there to filter out metal and debris..if its black its just wore out or burnt..i didnt know a filter could keep oil looking the same.. when i changed my mobil 1 oil. with a fl1a filter after 3200 miles. the oil only looked alittle darker then new.. i dont beat the crap out of my car either though..and this is with the clock reading 154,000 miles.