Thermostat Brand

[lawadm1]

I'm replacing the thermostat in my '05 GTP, and I was wondering if getting a thermostat from Advanced Auto for 7.99 (Standt Superstat) will do? Or should I stick with the AC-Delco? I called the parts department at the Chevy dealer here, and they wanted $71.50. Seems a little steep.

[lawadm1]

Also...to drill or not to drill? I'm also seeing a lot of threads and google searches where people have drilled a 1/8 hole in the 180 T-stat. Is this something to consider?

[SlowNA06]

But a 195* Superstat and do not drill it.

[lawadm1]

Why a 195 t-stat? I see a lot of recommendations for a 180, and that's why I bought a 180. I'm not putting it in until this weekend, but if there's an excellent reason for sticking with the 195, then I'd like to hear it.

I see some people say the gas mileage is worse with a 180, but I know my GTP runs A LOT better when the engine is cooler.

[Bio248]

if it runs better then something else is wrong. like your tune.

[SlowNA06]

Some bathroom reading:

http://www.grandprixforums.net/thermostat-47668.html
http://www.grandprixforums.net/160-1...tat-58538.html
http://www.grandprixforums.net/therm...ons-50054.html
http://www.grandprixforums.net/thermostat-44175.html
http://www.grandprixforums.net/therm...ion-43911.html
http://www.grandprixforums.net/therm...0-a-39190.html
http://www.grandprixforums.net/best-...tat-35141.html
http://www.grandprixforums.net/t-stat-help-55228.html

[Bio248]

I see some people say the gas mileage is worse with a 180, but I know my GTP runs A LOT better when the engine is cooler.

oh, and if you mean "cooler" like when below 160* and the knock sensors aren't on yet then congratulations on your new motor purchase.