180 I can say a sustained wind on hoses and fuel lines does affect temps. You feel colder because you are colder. We have trucks idling around the yard and do fine, and soon as they leave, get on the road up to speed, fuel lines freeze. But, I am sure you know better than me and my 3 million miles dealing with this crap. WP....glad they work for you now. Some of the cheap stuff isn't made to go down to the temps we have been having lately.