I know nothing about vehicles but, over the years, I learned just how important it is to have someone who does be responsible for ongoing care.  Poor tire pressure, missed oil changes, and poor wheel alignment can suck $$ in higher gas use.  Same goes for vehicle appearance.  Dirty vehicles whether yours or your techs give your company a terrible image. 

Appoint someone to be in charge and put everything on a schedule whether it is maintenance or washing.  I suggest cutting a deal with a local repair/maintenance shop to get discounts.  This can be argued as "given business" so a discount is to their advantage.  Also ask that they notify you of Specials, Tire Sales, and the like so you can save even more.  Do this for the company gas card as well.  It may be that you can let them have your vehicles for service on "off" times.  Another way for a Win/Win situation.  Then, relook at this arrangement every year or so.

And, while we are talking about vehicles, look at the graphics on vehicles.  Is your web site prominently displayed?  800 or  regular phone number?  On the other hand, unless you are a retail location, you do not need to take up space listing your address.  Instead, a line stating your geographic area would be more to the point.

Lastly, check out insurance coverage and consider bidding it out every few years as well.  Now, go get ‘em, Nascar drivers.