[Hardattack]

My wife was telling her boss about me playing arround with my car trying to get better mpg. She was joking about it but sounds like he took it to heart. Now he wants me to help him with his fleet. He has 21 delivery trucks approx. 1 million miles per year. Don't have exact list of makes yet. I know there is some sprinters, ford and chevy vans, nissan box vans and some box trucks. I believe the box trucks have cummins in them. It is a FedEx ground/home delivery fleet so any thing that he does will have to be user friendly. I have not talked to him yet but am going to suggest him making drivers check tires(max air) every morning and keeping big clumps of mud off trucks as much as possible just to get things started.
I would love to hear y'all's ideas. Thanks