"To say that the system worked well is an understatement. The increase in fuel economy has more than paid for itself in 2.5 months and we are looking forward to putting some cash back in our pocket rather than giving it to the fuel company. The baseline was calculated at 6.2 MPG and after the installation; we have seen an increase of up to 9.10 MPG, and a running average of over 8.60 MPG. That average equates to over 39% increase! That increase will save us over $ 11,951.00 /year. I don't know of many things that have a better return on investment than this."