What color is your rig to begin with?

If its light in color I have to imagine a white roof will only help marginally. If its dark on the other hand, it will not only bee easier to keep cool with your AC but I would think it will be marginally cooler parked in the sun versus a rig with a dark roof...

At least that's my WAG...

Off Roader
98 Montero with the Winter Package
89 Montero minty clean and reserved for overlanding trips or Cars and Coffee events
96SR (3.15:1 xcase, 35's) gone to the rust gods
96SR Build Up Thread
Old web page
Old web page