Thermostat question
09-10-2016, 10:03 AM
#11
That seems to be the idea that I have gotten from reading stuff around the ultraweb. I haven't been able to find a Motorcraft 195 thermostat though. Any ideas on where to get one? The MC option at Rockauto is a 190, but it also says that it's NOT the manufacturer recommended temp. Any other suggestions on a solid brand for this?
09-12-2016, 10:41 PM
#12
Senior Member
A few years ago, I tried a 160, a 180, and back to a 195 in my '96 4.9. Without any doubt, the truck runs better with the 195. I wouldn't worry to much about the brand unless your "brand name buyer". I bought the Duralast one at Auto Zone and it's worked fine.
09-13-2016, 05:49 AM
#13
Senior Member
Unless you have a specialized application, you always want to run it at the OE recommended temp. Most of that time it is 192-195. The trucks are designed to run at those temperatures and will give the best performance/fuel economy within that range.
Using a 180 would almost certainly result in lowered mpg's.
Using a 180 would almost certainly result in lowered mpg's.
Now I do 