RE: Thermostat swap questions
 

I did notice a drop in mpg's when i put in the 180 but i like the power more.

RE: Thermostat swap questions
 

Hey popo, how many mpg do you think you lost? I'm going for more mpg but at the same time i would rather have the power.
I tried to put in the 180 deg. hypertech powerstat but the guys at detriot speed sold me an ls1 setup that, as i found out does not even fit into the waterpump inlet. I'm thinking it was for the 03' and older as mine isan 04'. Does anyone know of this change?
Ryan

RE: Thermostat swap questions
 

I have noticed that most of the parts I look up seem to stop at 2003 (example:1995-2003) so it probably is different. As far as MPG's go i think i may have lost 1 or 2. I avg 17-18 mpg not too bad considering I don't really baby the throttle. I don't think that I will change back until gas breaks the $4 mark. I say go for it and save the stock one if you don't like it. If you're carefull you should only lose about 2 cups of coolant during the install.

RE: Thermostat swap questions
 

I got freakin hills to worry about or else I'd go for it. I drove my truck to Florida and back this past year. I got twice the gas milage down South compared to PA, VW, VA areas. I never realized how much PA hilly terrain killed my mph until then. I mean I used 1 tank from Pittsburgh PA to VA state line, then one more form VA to the South Carolina state line. I only used 1 tank of gas from South Carolina to St. Petersburgh Florida. I'm trying to focus on fuel saving mods after that trip.