I made an interesting connection last night....
I need to change the oil in my riding mower. It's a 20hp Kohler. Have always just bought the Kohler brand filter at Sears for about $10. With Sears out of the picture I start looking where I can get it. Can get the Kohler online for as low as $8, but just wanted to go pick one up. Tractor supply wants $12. Thinking this thing cant be that special.. Well, it's not. Pretty much every filter name has a cross reference to it. Figured I would see if AZ carries them. So I put the Purolator # in their search. Comes back with the little header statement " This part is an exact match for your 2003 Dodge Neon"
GTFO!