Saving our data is another thing the Pro EGS does. Plus, the addition of the 2MB memory module leaves 24 folders for logging data one hour at a time. The great feature about this is that the user has the ability to go back and view what the car was doing--whether under hard acceleration or braking. Got a spike in the air/fuel ratio and didn't realize it? This very function will let you know when and where it's occurring, giving you the ability to fix it.