Calculate savings for each MPG gain
 

After spending countless hours reading ecomodder posts about aeromods and other ways to eek out another 1.5 MPG gain, I thought, ok before I do this crazy thing, how much is this actually going to save me in fuel, and when would be the break even point? So for all of you that want to do a similar exercise I've attached a spreadsheet that tells you exactly how much money you save for every 1 MPG improvement!
Enjoy!
Jason

Actually, I was just thinking this would be more useful if it went from 15MPG all the way to something like 80 MPG. I'll add those values and upload the results.

Ok, attached you'll see the cost savings for every 1 MPG improvement from 15 MPG to 80 MPG. You'll notice that for the first few improvements it is a significant cost savings.