Rob, I know your car is "going" to be fast, but until then we all own you.lol
Good luck on the custody though, I can't imagine as a fellow father what you must be going through.
My F-250's have 30 gallon tanks times 4.oo a gallon=$260 per fill up and believe me I fill up way more than once or twice aweek.(9 mpg)
Rx-7 has 16 gallon tank times 4.20(if lucky) a gallon=67.20 to fill up(around once to twice aweek)
Acura MDX(the wife)- 18 gallon tank times 4.20 a gallon= 75.60 per fill up...