I have seen a few different attempts at making the Insight get better MPG by increasing the temp. My question is: The temp of what? Some people block radiators, some people put a hair dryer down the air intake. Is it the fact that the intake air is warm which aids mileage? Or, is it just a warm engine in general? Is it both? If you do run the engine at an "artificially" warm temp, is that bad for the engine? I would really like to make some type of simple temp altering mod. Please let me know if you have anwers to any of my questions. Also, any links to sites with examples of mods would be great. Thanks.