[MetroMPG]

Agreed - you're admirably brave for a teenager! I seem to remember everyone (self included) being overly preoccupied with what everyone else might think at that age.

Question: you don't have a fuel log here (doesn't mean you don't keep records). How are you going to be able to determine the tail's effect on MPG? Of course, if it's close to "the template", we know it'll be an improvement regardless.