I think I need a new thermostat. what temp is the best for the powerstroke?

 

Click Here This is the thermostat that I have installed on both of my PSD's, I have a live data scanner, and the difference was significant, 164 deg oil temp to 204 deg, but my old one looks like it was weak. Lie-o-meter said 1.1 mpg increased actual calculations showed .75 mpg increase over average, but that has been only one tank of gas

 

what year is your truck?

 

oh yeah good point, I assumed he needs the long stem thermostat.

 

sorry my truck is a 95 4wd f350 crew cab all stock. 389000 miles on truck

 

You will have a short stem thermostat and the last stat I bought that was for my 95 (3 years ago) from napa was a 203° stat which is what you want!

 

Is there a great improvement with 203* stat compared to stock one?

 

I wouldn't call it great, but it worth $35!