When you download the engine parameters you will end up with 22 pages of seemingly nonsensical settings that can be changed, enabled, modified and tweaked to suit your operation.  Downloading and adjusting engine settings has become a large part of the value proposition for some fleet managers.  Some have realized gains of as much as .4 MPG by adjusting the settings.  If you are a fleet manager, it is well worth your time to learn the many functions of your engine parameters and to adjust them so your trucks run at optimum efficiency. 

To read the full article clike here: http://fleetowner.com/maintenance/ecm-settings-can-make-or-break-your-fuel-economy