Very interesting, I like the fan setup. I currently experience higher temps when I get off the high way after about a one hour drive everyday and I'm looking to render this problem. However I believe my problem is the fan clutch. I noticed since my lift and tires my speedo is off by about 5mph at 65 on the dash. So at 65 mph I'm actually doing 70. Interesting reading about the same stuff I've been tinkering with. I also have 3.07 gears but I'm running 32"x11.50 tires I'm figuring my mpg is around 18-19 if I drive it easy and do 65mph (gps speed).