I am getting a 2008 Element EX. Currently has no options but I would like to add the Door Visors, Air Deflector, and Splash Guards. I want to try and get the best MPG possible. How much do you think this would effect the car? I know that each one is very small but I dont want them all to combine into a big change. Thanks

You hit on it, Jynx. Small changes accrue. But your driving style will make more of a difference than a little extra parasitic drag.