I drove my 02 Kalahari 300 miles last Saturday and yes it was a constant 2-4F lower than usual.

 

Are you sure your not just imagining it mate? I got the same on mine - tank, 3 way, and T connect. Didn't see any 2-4 C drops.

 

No offense, a 2 - 4 degree change in Celsius is more significant that a 2 -4 degree change in Fahrenheit.

 

I watch my Scangauge II during trips on a normal basis and I was seeing 182F at 70MPH when I’m maybe 186F at the lowest normally. The weather was not cold & I should have been in the 188/193F range.

It’s made a little difference & if the tank had a griddle on it I could easily cook a grilled cheese sandwich no question lol.