3.7L Duratec V6 (MKZ/MKS)
MKZ (2010-2020), MKS (2009-2016), MKX 3.7 (2011-2015). Ford Duratec 3.7L V6 — naturally-aspirated port injection. Cross-brand shared with Ford Edge, Explorer, Mustang V6. Robust, clean donor pool, no direct injection carbon issues.