[jbadamo]

So here is my findings:

Stock 23.9 mpg

2 inch drop 24.7 mpg = .8 mpg improvement

Larger air dam 25.1 mpg = .4 mpg improvement

Skirts 25.6 = .5 mpg improvement

Total improvement was 1.7 mpg

I know this was not done in a lab but I tried to make everything constant as possible. I used same gas from same pump every tank, except one tank, and drove with cruise on 70 mph. I checked air in tires every Saturday and washed truck every two weeks. Everything I could control I did, I did drive in the rain a few times but it could not be helped. I know I will not get a return on my money all $150.00 I spent on upgrades but it was fun doing everything. I'm looking at doing maybe a front under tray and rear diffuser and will update this when I can get them done. Those will wait to spring when it warms up to work outside. I'm going to plasti dip wheels which should not effect mpg but if it does I will let you know.