Re: Ford Focus 2.0 SOHC (SPI) thermostat cooling issue
Vin 3 is the Zetec IIRC, but either way, the Zetec and SPI are almost identical, The only difference is the heads,and a few exterior motor parts. Put a 195 in there, 180 doesn't even make sense with a stock focus motor, I know people who build performance motors whether it be Duratec, Zetec, or SPI, they don't use 180 unless they have a turbo or supercharger going on, or a lot of N/A parts.
So 195 is what I'd put in, but your going to find out when you actually get to a store(autozone, Advance auto parts), that they got three options, 180, 192, 195, either 192 or 195 will work fine.
I'm actually using 180 in my Duratec 2.3l right now, and 195 in my Zetec. I'm running a little colder on the D23 because I'm starting to put more and more mods on it, and for how I drive it, being colder will help in my case.