For the 24V motor 99 Taurus DOHC. Motorcraft.com claims its a OE 190F stat. Ford will tell you its 180F stat. I think its Motorcraft # RT 1104. This is for both the same OE part number. There are many on this site who say this stat is 190F. When you look inside the stat it says 180F stat. Who should I believe, and why cant both Ford and Motorcraft get on the same page. I have had numerous issues with aftermarket stats, the one which seemed to hold up the longest and maintain 190F happend to be Napa. Almost every one on this site swear by a motorcraft stat, why, when you cant even get an answer between Ford/Motorcraft that matches. In cold weather this is when I have all my problems of getting a stable temp. In the summer you cant tell any diffrence. So, can anyone get a straight answer? FWIW, I just picked up my second Morocraft stat in 1 year. First of all the bottom brass ring was all blackened/tarnsihed up as If it had been in a car already. I asked the parts guy who told me Motorcraft dosent coat that ring like aftermarket stats, thats why it was all messed up. My best guess was that stat had already been in a car and returned. I have put in 8-10 stats in my car in 1 year to try and get it right. Every stat (except the Motocraft) that brass bottom ring was perfectly clean and shiny. I dont know what to believe anymore. In addition, how can you tell a motorcaft stat from a aftermarket (stant), as they look identical in every possible way. Of course there is no Motorcaft insignia on a Motorcraft stat, they both have a jiggle valve, they both say USA on the ring, and they say 54mm, I believe. How do I know I am getting what I paid for, and what is the damn temp? Thanks Guys...