By way of a rough estimat I have saved $1160.07 over 33382 miles. The way I have estimated that number is 702 gallons used at 47.74 mpg life time average, 1043.2 gallons at EPA 32 mpg. so 1043 - 702 = 341 gallons saved at aprox $3.40/gallon. I suspect that as much as half is due to grill blocks, under tray and hubcaps and half is due to hypermilling. My objective is to follow in your foot steps and install a boat tail and other aero improvements so that I can get to 3.3L/100km or 71 mpg without as much hyper mileing. my investment is around $300 to date.
I have an other way of thinking about this and it goes like this; the average vehicle gets around 22 mpg I get 47 mpg a differance of 25mpg so 33382 miles at 25 mpg is 1335.28 gallons at $3.40/gal is $4539.95 not spent on fuel. Which means that it is money I can spend on future areo mods and still be no wears off than the average driver.
