Originally Posted by Chemcorp158

I do understand that 180 is not the temp I would be running with a 180 stat, but I keep hearing of people who are running 188 - 198 with that stat. I guess 95 deg with 100% humidity and a black truck probably doesn't help either. I do not seem to be running lean and I don't think my cat is plugged. I may go back to the 93 octane and see if that makes a difference, I have been using mid grade. I have heard that the OEM and Britparts are fully open at 180 where the motorad is starting to open at 180 but not fully open till 185-188. I don't know if this is true or just hearsay.