Driving on the road is fine, it stays around 185-190, but when I get offroad and I'm not driving at highway speeds, it starts to get a little warmer...It got up to around 215 when I was running it hard, and one time it got up to around 225...I have two 10" fans on it, both flowing about 2800 cfm combined (rated anyways) with the factory radiator. I may take Jay's single core radiator (that'll give me more room up front) and put it up front and take my two core and mount it where the spare tire goes and run a couple 1.5" lines up front...
As far as my fuel mileage goes, I also still have to connect up rear O2 sensor, I need to make an extension as the sensor doesn't reach the harness, so once I do that I know I will get a little better mpg's...
SVT