ive been getting that code for a long time now...not sure why ive changed tstats 3 times...it runs fine...i clear the light with my sct tuner but it comes back a bout a week later...

 

I usually run regular unleaded (89 Octane) with injector cleaner from time to time.

Oh, you're asking about the radiator. Never mind!

 

Thanks for the info Aim, I think I'll go back to 190 stat instead of 180, I just think that with this code the computer is dumping unneeded fuel to get the motor warm. Has anyone ran a 160 stat and thrown a code? If so, what was it?