If you only have 20-40 miles in a couple trips how did it even warm up? The vehicle will run a little bit off until it is warm, at least mine does.
It's warming up. Temp gauge shows 186 steady and I've had the fan come on once. I'm admittedly a bit timid cause there's so many mods I made it's a bit scary
What engine isnt HOT in 30 miles? Are you bent?
Those boys above the 48th, they pack their radiators with card board and I bet they still have to do 30 miles to get the heat on. Mine warms up in about 5 miles of city driving. Warm air at the defrosters in like 1/2 mile. And I have extra lengths of hose for the Veg Oil heat exchangers.