Quote Originally Posted by Zef_66 View Post
The whole thing with a colder t-stat is that it keeps the engine a little cooler, yes. But this also will make the PCM add fuel. Thus, your fuel economy will drop. And most of you say" So what, I want performance. And the colder t-stat makes my car run like a raped ape!" Again, I have to ask, do you realize why this is the case?

If you tune the car for the colder T-Stat you can keep the same milage and get power gains I am running a 160 t-stat and intercooled car all year and still get good mileage