Those are Wix factory numbers I think. Napa (Gold) and Car Quest (blue) are also Wix and use a different prefix. I'll only use Wix at this point. The cheap filters have all had varying levels of issues over the past 25 years. So I only use Wix/Car Quest.
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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