I had the dealer put a new H-D fairing mount oil temp gauge on my 2011 trike. I also have one of those oil temp gauges that screw into the oil fill spout. The other day after a 20 mile ride I checked them.The fairing gauge read 173 and the tank gauge read 218.That was with the air temp of around 30 degrees. Which one would you guys believe?:Shrug: