Been running these filters on my 1989 ford aerostar 3.0 with no problems, but I thought I would open one up to see how well the quality is. Media seems super tough, the spacing of the media needs some work, what do you all think? Oh, check out the picture of the box, too bad the makers of Supertech oil filters can't spell. It says Super Tech Filters are warranted against defecs in desing. Maybe they meant Defects in design. I personally will keep using ST oil filters because I think they are good enough for my 2500-3000 mile oil changes.