I have a genuine 180 grey stat, second one in a year too. All new cooling system including radiator, hoses, water pump, reservoir with cap, and hd fan clutch. I cruise at 190-195 all day long. Idle temps are 203-206. Don't worry about anything under 210.

 

That was my experience.

 

If you get a 180F Thermostat online/local and it’s white/clear with MOTORAD on it return it ASAP or toss it into the trash! Grey OEM/Black Britpart is the only way I go or recommend.

 

Were would i get the britpart one?

 

Lucky8

 

Well, here seems to be my problem. I knew I screwed up by thinking that the 180deg claim was correct on that autozone thermostat.

 

I bought this black britpart 180 from lucky8 on ebay:

https://www.ebay.com/itm/111416746797

 

Yep usually you can tell what the temp really is by reading the temp rating on the actual copper guts of the thermostat or at least on the outer rings. Auto Zone used to only sell OEM temp stats by motorad. They list 180F but I think that is false.